72627657 has 4 divisors (see below), whose sum is σ = 96836880. Its totient is φ = 48418436.

The previous prime is 72627647. The next prime is 72627661. The reversal of 72627657 is 75672627.

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.

It is a cyclic number.

It is not a de Polignac number, because 72627657 - 2¹² = 72623561 is a prime.

It is a super-2 number, since 2×72627657² = 10549553122619298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72627647) 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, 12104607 + ... + 12104612.

It is an arithmetic number, because the mean of its divisors is an integer number (24209220).

Almost surely, 2^72627657 is an apocalyptic number.

It is an amenable number.

72627657 is a deficient number, since it is larger than the sum of its proper divisors (24209223).

72627657 is a wasteful number, since it uses less digits than its factorization.

72627657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24209222.

The product of its digits is 246960, while the sum is 42.

The square root of 72627657 is about 8522.1861631861. The cubic root of 72627657 is about 417.2221383716. Note that the first 3 decimals are identical.

The spelling of 72627657 in words is "seventy-two million, six hundred twenty-seven thousand, six hundred fifty-seven".