2639298817 has 2 divisors, whose sum is σ = 2639298818. Its totient is φ = 2639298816.

The previous prime is 2639298811. The next prime is 2639298853. The reversal of 2639298817 is 7188929362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2476455696 + 162843121 = 49764^2 + 12761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2639298817 is a prime.

It is not a weakly prime, because it can be changed into another prime (2639298811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319649408 + 1319649409.

It is an arithmetic number, because the mean of its divisors is an integer number (1319649409).

Almost surely, 2^2639298817 is an apocalyptic number.

It is an amenable number.

2639298817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639298817 is an equidigital number, since it uses as much as digits as its factorization.

2639298817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 2639298817 is about 51374.1064837141. The cubic root of 2639298817 is about 1381.9622747815.

The spelling of 2639298817 in words is "two billion, six hundred thirty-nine million, two hundred ninety-eight thousand, eight hundred seventeen".