83012791 has 4 divisors (see below), whose sum is σ = 83251000. Its totient is φ = 82774584.

The previous prime is 83012789. The next prime is 83012801. The reversal of 83012791 is 19721038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19721038 = 2 ⋅9860519.

It is a cyclic number.

It is not a de Polignac number, because 83012791 - 2¹ = 83012789 is a prime.

It is a super-2 number, since 2×83012791² = 13782246939219362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83012701) 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, 118581 + ... + 119278.

It is an arithmetic number, because the mean of its divisors is an integer number (20812750).

Almost surely, 2^83012791 is an apocalyptic number.

83012791 is a deficient number, since it is larger than the sum of its proper divisors (238209).

83012791 is a wasteful number, since it uses less digits than its factorization.

83012791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238208.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 83012791 is about 9111.1355494252. The cubic root of 83012791 is about 436.2294737238.

The spelling of 83012791 in words is "eighty-three million, twelve thousand, seven hundred ninety-one".