642500953 has 4 divisors (see below), whose sum is σ = 642603060. Its totient is φ = 642398848.

The previous prime is 642500891. The next prime is 642500977. The reversal of 642500953 is 359005246.

642500953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163635264 + 478865689 = 12792^2 + 21883^2 .

It is a cyclic number.

It is not a de Polignac number, because 642500953 - 2¹⁷ = 642369881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642509953) 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, 40948 + ... + 54421.

It is an arithmetic number, because the mean of its divisors is an integer number (160650765).

Almost surely, 2^642500953 is an apocalyptic number.

It is an amenable number.

642500953 is a deficient number, since it is larger than the sum of its proper divisors (102107).

642500953 is an equidigital number, since it uses as much as digits as its factorization.

642500953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102106.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 642500953 is about 25347.6025099022. The cubic root of 642500953 is about 862.8949461413.

The spelling of 642500953 in words is "six hundred forty-two million, five hundred thousand, nine hundred fifty-three".