252666091 has 2 divisors, whose sum is σ = 252666092. Its totient is φ = 252666090.

The previous prime is 252666083. The next prime is 252666133. The reversal of 252666091 is 190666252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252666091 - 2³ = 252666083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252666091.

It is not a weakly prime, because it can be changed into another prime (252666191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126333045 + 126333046.

It is an arithmetic number, because the mean of its divisors is an integer number (126333046).

Almost surely, 2^252666091 is an apocalyptic number.

252666091 is a deficient number, since it is larger than the sum of its proper divisors (1).

252666091 is an equidigital number, since it uses as much as digits as its factorization.

252666091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 252666091 is about 15895.4739155522. The cubic root of 252666091 is about 632.1919873851.

The spelling of 252666091 in words is "two hundred fifty-two million, six hundred sixty-six thousand, ninety-one".