77316139 has 4 divisors (see below), whose sum is σ = 79810240. Its totient is φ = 74822040.

The previous prime is 77316121. The next prime is 77316143. The reversal of 77316139 is 93161377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93161377 = 17 ⋅5480081.

It is a cyclic number.

It is not a de Polignac number, because 77316139 - 2¹¹ = 77314091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77316098 and 77316107.

It is not an unprimeable number, because it can be changed into a prime (77316439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247004 + ... + 1247065.

It is an arithmetic number, because the mean of its divisors is an integer number (19952560).

Almost surely, 2^77316139 is an apocalyptic number.

77316139 is a deficient number, since it is larger than the sum of its proper divisors (2494101).

77316139 is a wasteful number, since it uses less digits than its factorization.

77316139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494100.

The product of its digits is 23814, while the sum is 37.

The square root of 77316139 is about 8792.9596268833. The cubic root of 77316139 is about 426.0135238567.

The spelling of 77316139 in words is "seventy-seven million, three hundred sixteen thousand, one hundred thirty-nine".