77077139 has 4 divisors (see below), whose sum is σ = 77100000. Its totient is φ = 77054280.

The previous prime is 77077111. The next prime is 77077141. The reversal of 77077139 is 93177077.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77077139 - 2²⁴ = 60299923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77077096 and 77077105.

It is not an unprimeable number, because it can be changed into a prime (77077339) 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 in 3 ways as a sum of consecutive naturals, for example, 5264 + ... + 13485.

It is an arithmetic number, because the mean of its divisors is an integer number (19275000).

Almost surely, 2^77077139 is an apocalyptic number.

77077139 is a deficient number, since it is larger than the sum of its proper divisors (22861).

77077139 is a wasteful number, since it uses less digits than its factorization.

77077139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22860.

The product of its (nonzero) digits is 64827, while the sum is 41.

The square root of 77077139 is about 8779.3586895627. The cubic root of 77077139 is about 425.5741057883.

The spelling of 77077139 in words is "seventy-seven million, seventy-seven thousand, one hundred thirty-nine".