8139977 has 4 divisors (see below), whose sum is σ = 8313216. Its totient is φ = 7966740.

The previous prime is 8139973. The next prime is 8139983. The reversal of 8139977 is 7799318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8139977 - 2² = 8139973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8139973) 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, 86549 + ... + 86642.

It is an arithmetic number, because the mean of its divisors is an integer number (2078304).

Almost surely, 2^8139977 is an apocalyptic number.

It is an amenable number.

8139977 is a deficient number, since it is larger than the sum of its proper divisors (173239).

8139977 is a wasteful number, since it uses less digits than its factorization.

8139977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173238.

The product of its digits is 95256, while the sum is 44.

The square root of 8139977 is about 2853.0644927867. The cubic root of 8139977 is about 201.1597370512.

The spelling of 8139977 in words is "eight million, one hundred thirty-nine thousand, nine hundred seventy-seven".