3077991391 has 2 divisors, whose sum is σ = 3077991392. Its totient is φ = 3077991390.

The previous prime is 3077991359. The next prime is 3077991403. The reversal of 3077991391 is 1931997703.

It is a strong prime.

It is an emirp because it is prime and its reverse (1931997703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3077991391 - 2⁵ = 3077991359 is a prime.

It is a super-2 number, since 2×3077991391² = 18948062006140229762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3077991331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1538995695 + 1538995696.

It is an arithmetic number, because the mean of its divisors is an integer number (1538995696).

Almost surely, 2^3077991391 is an apocalyptic number.

3077991391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3077991391 is an equidigital number, since it uses as much as digits as its factorization.

3077991391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 321489, while the sum is 49.

The square root of 3077991391 is about 55479.6484397657. The cubic root of 3077991391 is about 1454.6409195654.

The spelling of 3077991391 in words is "three billion, seventy-seven million, nine hundred ninety-one thousand, three hundred ninety-one".