82980191 has 16 divisors (see below), whose sum is σ = 96833088. Its totient is φ = 69638400.

The previous prime is 82980173. The next prime is 82980193. The reversal of 82980191 is 19108928.

It is a cyclic number.

It is not a de Polignac number, because 82980191 - 2⁶ = 82980127 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 (82980193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159011 + ... + 159531.

It is an arithmetic number, because the mean of its divisors is an integer number (6052068).

Almost surely, 2^82980191 is an apocalyptic number.

82980191 is a deficient number, since it is larger than the sum of its proper divisors (13852897).

82980191 is a wasteful number, since it uses less digits than its factorization.

82980191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 82980191 is about 9109.3463541574. The cubic root of 82980191 is about 436.1723622728.

The spelling of 82980191 in words is "eighty-two million, nine hundred eighty thousand, one hundred ninety-one".