76704139 has 2 divisors, whose sum is σ = 76704140. Its totient is φ = 76704138.

The previous prime is 76704109. The next prime is 76704151. The reversal of 76704139 is 93140767.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 76704139 - 2²³ = 68315531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76704098 and 76704107.

It is not a weakly prime, because it can be changed into another prime (76704109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38352069 + 38352070.

It is an arithmetic number, because the mean of its divisors is an integer number (38352070).

Almost surely, 2^76704139 is an apocalyptic number.

76704139 is a deficient number, since it is larger than the sum of its proper divisors (1).

76704139 is an equidigital number, since it uses as much as digits as its factorization.

76704139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 76704139 is about 8758.0899173279. The cubic root of 76704139 is about 424.8865007184.

The spelling of 76704139 in words is "seventy-six million, seven hundred four thousand, one hundred thirty-nine".