642900963 has 6 divisors (see below), whose sum is σ = 857259844. Its totient is φ = 428571364.

The previous prime is 642900941. The next prime is 642900977. The reversal of 642900963 is 369009246.

It is a happy number.

It is not a de Polignac number, because 642900963 - 2⁵ = 642900931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642900983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36598 + ... + 51236.

Almost surely, 2^642900963 is an apocalyptic number.

642900963 is a deficient number, since it is larger than the sum of its proper divisors (214358881).

642900963 is an frugal number, since it uses more digits than its factorization.

642900963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29281 (or 14642 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 642900963 is about 25355.4917720008. The cubic root of 642900963 is about 863.0739834895.

The spelling of 642900963 in words is "six hundred forty-two million, nine hundred thousand, nine hundred sixty-three".