2691942377 has 2 divisors, whose sum is σ = 2691942378. Its totient is φ = 2691942376.

The previous prime is 2691942359. The next prime is 2691942391. The reversal of 2691942377 is 7732491962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2402568256 + 289374121 = 49016^2 + 17011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691942377 - 2¹⁴ = 2691925993 is a prime.

It is a super-2 number, since 2×2691942377² = 14493107522176820258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2691942307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345971188 + 1345971189.

It is an arithmetic number, because the mean of its divisors is an integer number (1345971189).

Almost surely, 2^2691942377 is an apocalyptic number.

It is an amenable number.

2691942377 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691942377 is an equidigital number, since it uses as much as digits as its factorization.

2691942377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 2691942377 is about 51883.9317804655. The cubic root of 2691942377 is about 1391.0900782596.

It can be divided in two parts, 26919 and 42377, that added together give a palindrome (69296).

The spelling of 2691942377 in words is "two billion, six hundred ninety-one million, nine hundred forty-two thousand, three hundred seventy-seven".