252378169 has 2 divisors, whose sum is σ = 252378170. Its totient is φ = 252378168.

The previous prime is 252378163. The next prime is 252378173. The reversal of 252378169 is 961873252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252333225 + 44944 = 15885^2 + 212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252378169 is a prime.

It is a super-2 number, since 2×252378169² = 127389480375585122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252378163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126189084 + 126189085.

It is an arithmetic number, because the mean of its divisors is an integer number (126189085).

Almost surely, 2^252378169 is an apocalyptic number.

It is an amenable number.

252378169 is a deficient number, since it is larger than the sum of its proper divisors (1).

252378169 is an equidigital number, since it uses as much as digits as its factorization.

252378169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 252378169 is about 15886.4146049384. The cubic root of 252378169 is about 631.9517610260.

The spelling of 252378169 in words is "two hundred fifty-two million, three hundred seventy-eight thousand, one hundred sixty-nine".