248818639 has 2 divisors, whose sum is σ = 248818640. Its totient is φ = 248818638.

The previous prime is 248818621. The next prime is 248818643. The reversal of 248818639 is 936818842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 248818639 - 2⁵ = 248818607 is a prime.

It is a super-2 number, since 2×248818639² = 123821430227624642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 248818592 and 248818601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248818139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124409319 + 124409320.

It is an arithmetic number, because the mean of its divisors is an integer number (124409320).

Almost surely, 2^248818639 is an apocalyptic number.

248818639 is a deficient number, since it is larger than the sum of its proper divisors (1).

248818639 is an equidigital number, since it uses as much as digits as its factorization.

248818639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 248818639 is about 15773.9861480857. The cubic root of 248818639 is about 628.9666767808.

The spelling of 248818639 in words is "two hundred forty-eight million, eight hundred eighteen thousand, six hundred thirty-nine".