82981913 has 8 divisors (see below), whose sum is σ = 100415232. Its totient is φ = 66943296.

The previous prime is 82981901. The next prime is 82981933. The reversal of 82981913 is 31918928.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82981913 - 2⁴ = 82981897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82981933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348545 + ... + 348782.

It is an arithmetic number, because the mean of its divisors is an integer number (12551904).

Almost surely, 2^82981913 is an apocalyptic number.

It is an amenable number.

82981913 is a deficient number, since it is larger than the sum of its proper divisors (17433319).

82981913 is a wasteful number, since it uses less digits than its factorization.

82981913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697351.

The product of its digits is 31104, while the sum is 41.

The square root of 82981913 is about 9109.4408719745. The cubic root of 82981913 is about 436.1753793929.

The spelling of 82981913 in words is "eighty-two million, nine hundred eighty-one thousand, nine hundred thirteen".