2690442857 has 2 divisors, whose sum is σ = 2690442858. Its totient is φ = 2690442856.

The previous prime is 2690442773. The next prime is 2690442913. The reversal of 2690442857 is 7582440962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2503601296 + 186841561 = 50036^2 + 13669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2690442857 is a prime.

It is not a weakly prime, because it can be changed into another prime (2690442257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345221428 + 1345221429.

It is an arithmetic number, because the mean of its divisors is an integer number (1345221429).

Almost surely, 2^2690442857 is an apocalyptic number.

It is an amenable number.

2690442857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690442857 is an equidigital number, since it uses as much as digits as its factorization.

2690442857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 2690442857 is about 51869.4790507867. The cubic root of 2690442857 is about 1390.8317326063.

The spelling of 2690442857 in words is "two billion, six hundred ninety million, four hundred forty-two thousand, eight hundred fifty-seven".