204639031 has 2 divisors, whose sum is σ = 204639032. Its totient is φ = 204639030.

The previous prime is 204639023. The next prime is 204639041. The reversal of 204639031 is 130936402.

204639031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204639031 - 2³ = 204639023 is a prime.

It is a super-2 number, since 2×204639031² = 83754266017237922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204639041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102319515 + 102319516.

It is an arithmetic number, because the mean of its divisors is an integer number (102319516).

Almost surely, 2^204639031 is an apocalyptic number.

204639031 is a deficient number, since it is larger than the sum of its proper divisors (1).

204639031 is an equidigital number, since it uses as much as digits as its factorization.

204639031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 204639031 is about 14305.2099250588. The cubic root of 204639031 is about 589.2905683501.

The spelling of 204639031 in words is "two hundred four million, six hundred thirty-nine thousand, thirty-one".