83072491 has 4 divisors (see below), whose sum is σ = 83246400. Its totient is φ = 82898584.

The previous prime is 83072447. The next prime is 83072513. The reversal of 83072491 is 19427038.

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 83072491 - 2¹³ = 83064299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83072401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86236 + ... + 87193.

It is an arithmetic number, because the mean of its divisors is an integer number (20811600).

Almost surely, 2^83072491 is an apocalyptic number.

83072491 is a deficient number, since it is larger than the sum of its proper divisors (173909).

83072491 is a wasteful number, since it uses less digits than its factorization.

83072491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173908.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 83072491 is about 9114.4111713264. The cubic root of 83072491 is about 436.3340225076.

The spelling of 83072491 in words is "eighty-three million, seventy-two thousand, four hundred ninety-one".