77388379 has 2 divisors, whose sum is σ = 77388380. Its totient is φ = 77388378.

The previous prime is 77388371. The next prime is 77388383. The reversal of 77388379 is 97388377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77388379 - 2³ = 77388371 is a prime.

It is a super-2 number, since 2×77388379² = 11977922408495282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77388371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38694189 + 38694190.

It is an arithmetic number, because the mean of its divisors is an integer number (38694190).

Almost surely, 2^77388379 is an apocalyptic number.

77388379 is a deficient number, since it is larger than the sum of its proper divisors (1).

77388379 is an equidigital number, since it uses as much as digits as its factorization.

77388379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 77388379 is about 8797.0664996918. The cubic root of 77388379 is about 426.1461638524.

The spelling of 77388379 in words is "seventy-seven million, three hundred eighty-eight thousand, three hundred seventy-nine".