749473921 has 8 divisors (see below), whose sum is σ = 856802240. Its totient is φ = 642210768.

The previous prime is 749473919. The next prime is 749473939. The reversal of 749473921 is 129374947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749473921 - 2¹ = 749473919 is a prime.

It is a super-2 number, since 2×749473921² = 1123422316518228482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749473721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11530 + ... + 40396.

It is an arithmetic number, because the mean of its divisors is an integer number (107100280).

Almost surely, 2^749473921 is an apocalyptic number.

It is an amenable number.

749473921 is a deficient number, since it is larger than the sum of its proper divisors (107328319).

749473921 is a wasteful number, since it uses less digits than its factorization.

749473921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32583.

The product of its digits is 381024, while the sum is 46.

The square root of 749473921 is about 27376.5213458540. The cubic root of 749473921 is about 908.3478136195.

The spelling of 749473921 in words is "seven hundred forty-nine million, four hundred seventy-three thousand, nine hundred twenty-one".