42638627 has 2 divisors, whose sum is σ = 42638628. Its totient is φ = 42638626.

The previous prime is 42638623. The next prime is 42638633. The reversal of 42638627 is 72683624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42638627 - 2² = 42638623 is a prime.

It is not a weakly prime, because it can be changed into another prime (42638623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21319313 + 21319314.

It is an arithmetic number, because the mean of its divisors is an integer number (21319314).

Almost surely, 2^42638627 is an apocalyptic number.

42638627 is a deficient number, since it is larger than the sum of its proper divisors (1).

42638627 is an equidigital number, since it uses as much as digits as its factorization.

42638627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 38.

The square root of 42638627 is about 6529.8259548016. The cubic root of 42638627 is about 349.3556225419.

The spelling of 42638627 in words is "forty-two million, six hundred thirty-eight thousand, six hundred twenty-seven".