77379009 has 4 divisors (see below), whose sum is σ = 103172016. Its totient is φ = 51586004.

The previous prime is 77378981. The next prime is 77379011. The reversal of 77379009 is 90097377.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77379009 - 2⁸ = 77378753 is a prime.

It is a super-2 number, since 2×77379009² = 11975022067644162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77379409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12896499 + ... + 12896504.

It is an arithmetic number, because the mean of its divisors is an integer number (25793004).

Almost surely, 2^77379009 is an apocalyptic number.

It is an amenable number.

77379009 is a deficient number, since it is larger than the sum of its proper divisors (25793007).

77379009 is a wasteful number, since it uses less digits than its factorization.

77379009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25793006.

The product of its (nonzero) digits is 83349, while the sum is 42.

The square root of 77379009 is about 8796.5339196754. The cubic root of 77379009 is about 426.1289642385.

The spelling of 77379009 in words is "seventy-seven million, three hundred seventy-nine thousand, nine".