248635657 has 2 divisors, whose sum is σ = 248635658. Its totient is φ = 248635656.

The previous prime is 248635643. The next prime is 248635663. The reversal of 248635657 is 756536842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137733696 + 110901961 = 11736^2 + 10531^2 .

It is a cyclic number.

It is not a de Polignac number, because 248635657 - 2²⁷ = 114417929 is a prime.

It is not a weakly prime, because it can be changed into another prime (248635157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124317828 + 124317829.

It is an arithmetic number, because the mean of its divisors is an integer number (124317829).

Almost surely, 2^248635657 is an apocalyptic number.

It is an amenable number.

248635657 is a deficient number, since it is larger than the sum of its proper divisors (1).

248635657 is an equidigital number, since it uses as much as digits as its factorization.

248635657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 46.

The square root of 248635657 is about 15768.1849621318. The cubic root of 248635657 is about 628.8124576209.

The spelling of 248635657 in words is "two hundred forty-eight million, six hundred thirty-five thousand, six hundred fifty-seven".