749024081 has 4 divisors (see below), whose sum is σ = 806641332. Its totient is φ = 691406832.

The previous prime is 749024069. The next prime is 749024161. The reversal of 749024081 is 180420947.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42315025 + 706709056 = 6505^2 + 26584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749024081 is a prime.

It is a super-2 number, since 2×749024081² = 1122074147835789122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749024281) 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, 28808606 + ... + 28808631.

It is an arithmetic number, because the mean of its divisors is an integer number (201660333).

Almost surely, 2^749024081 is an apocalyptic number.

It is an amenable number.

749024081 is a deficient number, since it is larger than the sum of its proper divisors (57617251).

749024081 is a wasteful number, since it uses less digits than its factorization.

749024081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57617250.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 749024081 is about 27368.3043135668. The cubic root of 749024081 is about 908.1660448050.

The spelling of 749024081 in words is "seven hundred forty-nine million, twenty-four thousand, eighty-one".