642853037 has 4 divisors (see below), whose sum is σ = 643051200. Its totient is φ = 642654876.

The previous prime is 642853019. The next prime is 642853061. The reversal of 642853037 is 730358246.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 642853037 - 2¹⁰ = 642852013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642853097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94133 + ... + 100730.

It is an arithmetic number, because the mean of its divisors is an integer number (160762800).

Almost surely, 2^642853037 is an apocalyptic number.

It is an amenable number.

642853037 is a deficient number, since it is larger than the sum of its proper divisors (198163).

642853037 is a wasteful number, since it uses less digits than its factorization.

642853037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198162.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 642853037 is about 25354.5466731314. The cubic root of 642853037 is about 863.0525365825.

The spelling of 642853037 in words is "six hundred forty-two million, eight hundred fifty-three thousand, thirty-seven".