642087627 has 16 divisors (see below), whose sum is σ = 864829440. Its totient is φ = 423720512.

The previous prime is 642087581. The next prime is 642087631. The reversal of 642087627 is 726780246.

It is a cyclic number.

It is not a de Polignac number, because 642087627 - 2¹¹ = 642085579 is a prime.

It is a super-2 number, since 2×642087627² = 824553041492982258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642087697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155374 + ... + 159452.

It is an arithmetic number, because the mean of its divisors is an integer number (54051840).

Almost surely, 2^642087627 is an apocalyptic number.

642087627 is a deficient number, since it is larger than the sum of its proper divisors (222741813).

642087627 is a wasteful number, since it uses less digits than its factorization.

642087627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 642087627 is about 25339.4480405553. The cubic root of 642087627 is about 862.7098707095.

The spelling of 642087627 in words is "six hundred forty-two million, eighty-seven thousand, six hundred twenty-seven".