252180989 has 2 divisors, whose sum is σ = 252180990. Its totient is φ = 252180988.

The previous prime is 252180967. The next prime is 252180997. The reversal of 252180989 is 989081252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243672100 + 8508889 = 15610^2 + 2917^2 .

It is a cyclic number.

It is not a de Polignac number, because 252180989 - 2¹² = 252176893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252180919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126090494 + 126090495.

It is an arithmetic number, because the mean of its divisors is an integer number (126090495).

Almost surely, 2^252180989 is an apocalyptic number.

It is an amenable number.

252180989 is a deficient number, since it is larger than the sum of its proper divisors (1).

252180989 is an equidigital number, since it uses as much as digits as its factorization.

252180989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 252180989 is about 15880.2074608615. The cubic root of 252180989 is about 631.7871393995.

The spelling of 252180989 in words is "two hundred fifty-two million, one hundred eighty thousand, nine hundred eighty-nine".