749941921 has 16 divisors (see below), whose sum is σ = 779315904. Its totient is φ = 721315584.

The previous prime is 749941919. The next prime is 749941931. The reversal of 749941921 is 129149947.

It is a cyclic number.

It is not a de Polignac number, because 749941921 - 2¹ = 749941919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749941901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522621 + ... + 524053.

It is an arithmetic number, because the mean of its divisors is an integer number (48707244).

Almost surely, 2^749941921 is an apocalyptic number.

It is an amenable number.

749941921 is a deficient number, since it is larger than the sum of its proper divisors (29373983).

749941921 is a wasteful number, since it uses less digits than its factorization.

749941921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its digits is 163296, while the sum is 46.

The square root of 749941921 is about 27385.0674821151. The cubic root of 749941921 is about 908.5368432447.

The spelling of 749941921 in words is "seven hundred forty-nine million, nine hundred forty-one thousand, nine hundred twenty-one".