252930991 has 4 divisors (see below), whose sum is σ = 253028152. Its totient is φ = 252833832.

The previous prime is 252930973. The next prime is 252931027. The reversal of 252930991 is 199039252.

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 252930991 - 2⁵ = 252930959 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 (252930901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44565 + ... + 49918.

It is an arithmetic number, because the mean of its divisors is an integer number (63257038).

Almost surely, 2^252930991 is an apocalyptic number.

252930991 is a deficient number, since it is larger than the sum of its proper divisors (97161).

252930991 is an equidigital number, since it uses as much as digits as its factorization.

252930991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97160.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 252930991 is about 15903.8042933130. The cubic root of 252930991 is about 632.4128443080.

The spelling of 252930991 in words is "two hundred fifty-two million, nine hundred thirty thousand, nine hundred ninety-one".