77934959 has 2 divisors, whose sum is σ = 77934960. Its totient is φ = 77934958.

The previous prime is 77934931. The next prime is 77934991. The reversal of 77934959 is 95943977.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77934959 - 2¹² = 77930863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77934959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77934559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38967479 + 38967480.

It is an arithmetic number, because the mean of its divisors is an integer number (38967480).

Almost surely, 2^77934959 is an apocalyptic number.

77934959 is a deficient number, since it is larger than the sum of its proper divisors (1).

77934959 is an equidigital number, since it uses as much as digits as its factorization.

77934959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2143260, while the sum is 53.

The square root of 77934959 is about 8828.0778768654. The cubic root of 77934959 is about 427.1470753186.

The spelling of 77934959 in words is "seventy-seven million, nine hundred thirty-four thousand, nine hundred fifty-nine".