77009039 has 4 divisors (see below), whose sum is σ = 77089320. Its totient is φ = 76928760.

The previous prime is 77009017. The next prime is 77009041. The reversal of 77009039 is 93090077.

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 77009039 - 2²⁰ = 75960463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77009089) 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, 38684 + ... + 40625.

It is an arithmetic number, because the mean of its divisors is an integer number (19272330).

Almost surely, 2^77009039 is an apocalyptic number.

77009039 is a deficient number, since it is larger than the sum of its proper divisors (80281).

77009039 is an equidigital number, since it uses as much as digits as its factorization.

77009039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80280.

The product of its (nonzero) digits is 11907, while the sum is 35.

The square root of 77009039 is about 8775.4794171031. The cubic root of 77009039 is about 425.4487329624.

The spelling of 77009039 in words is "seventy-seven million, nine thousand, thirty-nine".