77071339 has 4 divisors (see below), whose sum is σ = 77203224. Its totient is φ = 76939456.

The previous prime is 77071331. The next prime is 77071343. The reversal of 77071339 is 93317077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93317077 = 7 ⋅13331011.

It is a cyclic number.

It is not a de Polignac number, because 77071339 - 2³ = 77071331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77071298 and 77071307.

It is not an unprimeable number, because it can be changed into a prime (77071331) 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, 65062 + ... + 66235.

It is an arithmetic number, because the mean of its divisors is an integer number (19300806).

Almost surely, 2^77071339 is an apocalyptic number.

77071339 is a deficient number, since it is larger than the sum of its proper divisors (131885).

77071339 is a wasteful number, since it uses less digits than its factorization.

77071339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131884.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 77071339 is about 8779.0283630935. The cubic root of 77071339 is about 425.5634308040.

The spelling of 77071339 in words is "seventy-seven million, seventy-one thousand, three hundred thirty-nine".