642316975 has 12 divisors (see below), whose sum is σ = 831103056. Its totient is φ = 491511680.

The previous prime is 642316957. The next prime is 642316981. The reversal of 642316975 is 579613246.

It is a de Polignac number, because none of the positive numbers 2^k-642316975 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 557962 + ... + 559111.

It is an arithmetic number, because the mean of its divisors is an integer number (69258588).

Almost surely, 2^642316975 is an apocalyptic number.

642316975 is a deficient number, since it is larger than the sum of its proper divisors (188786081).

642316975 is a wasteful number, since it uses less digits than its factorization.

642316975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117106 (or 1117101 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 642316975 is about 25343.9731494492. The cubic root of 642316975 is about 862.8125759176.

The spelling of 642316975 in words is "six hundred forty-two million, three hundred sixteen thousand, nine hundred seventy-five".