82177379 has 4 divisors (see below), whose sum is σ = 82208280. Its totient is φ = 82146480.

The previous prime is 82177351. The next prime is 82177397. The reversal of 82177379 is 97377128.

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 82177379 - 2²⁴ = 65400163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82177339) 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, 11042 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (20552070).

Almost surely, 2^82177379 is an apocalyptic number.

82177379 is a deficient number, since it is larger than the sum of its proper divisors (30901).

82177379 is a wasteful number, since it uses less digits than its factorization.

82177379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30900.

The product of its digits is 148176, while the sum is 44.

The square root of 82177379 is about 9065.1739641333. The cubic root of 82177379 is about 434.7611830446.

The spelling of 82177379 in words is "eighty-two million, one hundred seventy-seven thousand, three hundred seventy-nine".