747216457 has 8 divisors (see below), whose sum is σ = 804925184. Its totient is φ = 689540688.

The previous prime is 747216413. The next prime is 747216541. The reversal of 747216457 is 754612747.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-747216457 is a prime.

It is a super-2 number, since 2×747216457² = 1116664867223265698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747216557) 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, 59578 + ... + 71020.

It is an arithmetic number, because the mean of its divisors is an integer number (100615648).

Almost surely, 2^747216457 is an apocalyptic number.

It is an amenable number.

747216457 is a deficient number, since it is larger than the sum of its proper divisors (57708727).

747216457 is a wasteful number, since it uses less digits than its factorization.

747216457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16479.

The product of its digits is 329280, while the sum is 43.

The square root of 747216457 is about 27335.2603243503. The cubic root of 747216457 is about 907.4348955969.

The spelling of 747216457 in words is "seven hundred forty-seven million, two hundred sixteen thousand, four hundred fifty-seven".