642032087 has 2 divisors, whose sum is σ = 642032088. Its totient is φ = 642032086.

The previous prime is 642032033. The next prime is 642032093. The reversal of 642032087 is 780230246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642032087 - 2⁶ = 642032023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642032687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321016043 + 321016044.

It is an arithmetic number, because the mean of its divisors is an integer number (321016044).

Almost surely, 2^642032087 is an apocalyptic number.

642032087 is a deficient number, since it is larger than the sum of its proper divisors (1).

642032087 is an equidigital number, since it uses as much as digits as its factorization.

642032087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 642032087 is about 25338.3520971669. The cubic root of 642032087 is about 862.6849954506.

The spelling of 642032087 in words is "six hundred forty-two million, thirty-two thousand, eighty-seven".