252663139 has 2 divisors, whose sum is σ = 252663140. Its totient is φ = 252663138.

The previous prime is 252663091. The next prime is 252663221. The reversal of 252663139 is 931366252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252663139 - 2⁷ = 252663011 is a prime.

It is equal to p_13816963 and since 252663139 and 13816963 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 252663098 and 252663107.

It is not a weakly prime, because it can be changed into another prime (252663739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126331569 + 126331570.

It is an arithmetic number, because the mean of its divisors is an integer number (126331570).

Almost surely, 2^252663139 is an apocalyptic number.

252663139 is a deficient number, since it is larger than the sum of its proper divisors (1).

252663139 is an equidigital number, since it uses as much as digits as its factorization.

252663139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 252663139 is about 15895.3810586598. The cubic root of 252663139 is about 632.1895253241.

The spelling of 252663139 in words is "two hundred fifty-two million, six hundred sixty-three thousand, one hundred thirty-nine".