77940659 has 2 divisors, whose sum is σ = 77940660. Its totient is φ = 77940658.

The previous prime is 77940607. The next prime is 77940671. The reversal of 77940659 is 95604977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77940659 - 2²⁰ = 76892083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77943659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38970329 + 38970330.

It is an arithmetic number, because the mean of its divisors is an integer number (38970330).

Almost surely, 2^77940659 is an apocalyptic number.

77940659 is a deficient number, since it is larger than the sum of its proper divisors (1).

77940659 is an equidigital number, since it uses as much as digits as its factorization.

77940659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 77940659 is about 8828.4007045444. The cubic root of 77940659 is about 427.1574886129.

The spelling of 77940659 in words is "seventy-seven million, nine hundred forty thousand, six hundred fifty-nine".