77089139 has 2 divisors, whose sum is σ = 77089140. Its totient is φ = 77089138.

The previous prime is 77089081. The next prime is 77089141. The reversal of 77089139 is 93198077.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77089139 is a prime.

It is a super-2 number, since 2×77089139² = 11885470703522642, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 77089141, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77089139.

It is not a weakly prime, because it can be changed into another prime (77089939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38544569 + 38544570.

It is an arithmetic number, because the mean of its divisors is an integer number (38544570).

Almost surely, 2^77089139 is an apocalyptic number.

77089139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77089139 is an equidigital number, since it uses as much as digits as its factorization.

77089139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 77089139 is about 8780.0420841816. The cubic root of 77089139 is about 425.5961902625.

The spelling of 77089139 in words is "seventy-seven million, eighty-nine thousand, one hundred thirty-nine".