252618649 has 2 divisors, whose sum is σ = 252618650. Its totient is φ = 252618648.

The previous prime is 252618577. The next prime is 252618677. The reversal of 252618649 is 946816252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250747225 + 1871424 = 15835^2 + 1368^2 .

It is a cyclic number.

It is not a de Polignac number, because 252618649 - 2⁹ = 252618137 is a prime.

It is not a weakly prime, because it can be changed into another prime (252618689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126309324 + 126309325.

It is an arithmetic number, because the mean of its divisors is an integer number (126309325).

Almost surely, 2^252618649 is an apocalyptic number.

It is an amenable number.

252618649 is a deficient number, since it is larger than the sum of its proper divisors (1).

252618649 is an equidigital number, since it uses as much as digits as its factorization.

252618649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 252618649 is about 15893.9815339014. The cubic root of 252618649 is about 632.1524169392.

The spelling of 252618649 in words is "two hundred fifty-two million, six hundred eighteen thousand, six hundred forty-nine".