77345039 has 2 divisors, whose sum is σ = 77345040. Its totient is φ = 77345038.

The previous prime is 77345017. The next prime is 77345041. The reversal of 77345039 is 93054377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77345039 - 2²⁴ = 60567823 is a prime.

Together with 77345041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77344993 and 77345011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77345239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38672519 + 38672520.

It is an arithmetic number, because the mean of its divisors is an integer number (38672520).

Almost surely, 2^77345039 is an apocalyptic number.

77345039 is a deficient number, since it is larger than the sum of its proper divisors (1).

77345039 is an equidigital number, since it uses as much as digits as its factorization.

77345039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 77345039 is about 8794.6028335565. The cubic root of 77345039 is about 426.0665971103.

The spelling of 77345039 in words is "seventy-seven million, three hundred forty-five thousand, thirty-nine".