77070139 has 4 divisors (see below), whose sum is σ = 79727760. Its totient is φ = 74412520.

The previous prime is 77070073. The next prime is 77070157. The reversal of 77070139 is 93107077.

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 77070139 - 2²³ = 68681531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77070199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1328767 + ... + 1328824.

It is an arithmetic number, because the mean of its divisors is an integer number (19931940).

Almost surely, 2^77070139 is an apocalyptic number.

77070139 is a deficient number, since it is larger than the sum of its proper divisors (2657621).

77070139 is a wasteful number, since it uses less digits than its factorization.

77070139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657620.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 77070139 is about 8778.9600181343. The cubic root of 77070139 is about 425.5612221198.

The spelling of 77070139 in words is "seventy-seven million, seventy thousand, one hundred thirty-nine".