642957283 has 8 divisors (see below), whose sum is σ = 677088720. Its totient is φ = 608855040.

The previous prime is 642957281. The next prime is 642957307. The reversal of 642957283 is 382759246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642957283 - 2¹ = 642957281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642957281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49203 + ... + 60883.

It is an arithmetic number, because the mean of its divisors is an integer number (84636090).

Almost surely, 2^642957283 is an apocalyptic number.

642957283 is a deficient number, since it is larger than the sum of its proper divisors (34131437).

642957283 is a wasteful number, since it uses less digits than its factorization.

642957283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14597.

The product of its digits is 725760, while the sum is 46.

The square root of 642957283 is about 25356.6023552052. The cubic root of 642957283 is about 863.0991853533.

The spelling of 642957283 in words is "six hundred forty-two million, nine hundred fifty-seven thousand, two hundred eighty-three".