751362921 has 9 divisors (see below), whose sum is σ = 1085420791. Its totient is φ = 500853792.

The previous prime is 751362883. The next prime is 751362977. The reversal of 751362921 is 129263157.

The square root of 751362921 is 27411.

It is a perfect power (a square), and thus also a powerful number.

751362921 is a `hidden beast` number, since 7 + 5 + 1 + 3 + 629 + 21 = 666.

751362921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 743325696 = 2835^2 + 27264^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-751362921 is a prime.

It is a super-3 number, since 3×751362921³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (751360921) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 77665 + ... + 86801.

Almost surely, 2^751362921 is an apocalyptic number.

751362921 is the 27411-st square number.

751362921 is the 13706-th centered octagonal number.

It is an amenable number.

751362921 is a deficient number, since it is larger than the sum of its proper divisors (334057870).

751362921 is an frugal number, since it uses more digits than its factorization.

751362921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18280 (or 9140 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The cubic root of 751362921 is about 909.1103171163.

Multiplying 751362921 by its sum of digits (36), we get a square (27049065156 = 164466²).

The spelling of 751362921 in words is "seven hundred fifty-one million, three hundred sixty-two thousand, nine hundred twenty-one".