77670479 has 2 divisors, whose sum is σ = 77670480. Its totient is φ = 77670478.

The previous prime is 77670443. The next prime is 77670503. The reversal of 77670479 is 97407677.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77670479 - 2⁸ = 77670223 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77670419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38835239 + 38835240.

It is an arithmetic number, because the mean of its divisors is an integer number (38835240).

Almost surely, 2^77670479 is an apocalyptic number.

77670479 is a deficient number, since it is larger than the sum of its proper divisors (1).

77670479 is an equidigital number, since it uses as much as digits as its factorization.

77670479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 77670479 is about 8813.0856684818. The cubic root of 77670479 is about 426.6633390718.

The spelling of 77670479 in words is "seventy-seven million, six hundred seventy thousand, four hundred seventy-nine".