252139963 has 4 divisors (see below), whose sum is σ = 252205408. Its totient is φ = 252074520.

The previous prime is 252139939. The next prime is 252139997. The reversal of 252139963 is 369931252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252139963 - 2⁵ = 252139931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252139933) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 26556 + ... + 34777.

It is an arithmetic number, because the mean of its divisors is an integer number (63051352).

Almost surely, 2^252139963 is an apocalyptic number.

252139963 is a deficient number, since it is larger than the sum of its proper divisors (65445).

252139963 is an equidigital number, since it uses as much as digits as its factorization.

252139963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65444.

The product of its digits is 87480, while the sum is 40.

The square root of 252139963 is about 15878.9156745667. The cubic root of 252139963 is about 631.7528768315.

The spelling of 252139963 in words is "two hundred fifty-two million, one hundred thirty-nine thousand, nine hundred sixty-three".