749971081 has 4 divisors (see below), whose sum is σ = 750229200. Its totient is φ = 749712964.

The previous prime is 749971069. The next prime is 749971109. The reversal of 749971081 is 180179947.

749971081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180179947 = 317 ⋅568391.

It is a cyclic number.

It is not a de Polignac number, because 749971081 - 2⁷ = 749970953 is a prime.

It is a super-2 number, since 2×749971081² = 1124913244672617122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749971181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124651 + ... + 130528.

It is an arithmetic number, because the mean of its divisors is an integer number (187557300).

Almost surely, 2^749971081 is an apocalyptic number.

It is an amenable number.

749971081 is a deficient number, since it is larger than the sum of its proper divisors (258119).

749971081 is a wasteful number, since it uses less digits than its factorization.

749971081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258118.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 749971081 is about 27385.5998838806. The cubic root of 749971081 is about 908.5486186414.

The spelling of 749971081 in words is "seven hundred forty-nine million, nine hundred seventy-one thousand, eighty-one".