642352953 has 16 divisors (see below), whose sum is σ = 964472832. Its totient is φ = 376746000.

The previous prime is 642352937. The next prime is 642352957. The reversal of 642352953 is 359253246.

It is not a de Polignac number, because 642352953 - 2⁴ = 642352937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642352957) 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, 312933 + ... + 314978.

It is an arithmetic number, because the mean of its divisors is an integer number (60279552).

Almost surely, 2^642352953 is an apocalyptic number.

It is an amenable number.

642352953 is a deficient number, since it is larger than the sum of its proper divisors (322119879).

642352953 is a wasteful number, since it uses less digits than its factorization.

642352953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627956.

The product of its digits is 194400, while the sum is 39.

The square root of 642352953 is about 25344.6829335070. The cubic root of 642352953 is about 862.8286851453.

The spelling of 642352953 in words is "six hundred forty-two million, three hundred fifty-two thousand, nine hundred fifty-three".