83831491 has 2 divisors, whose sum is σ = 83831492. Its totient is φ = 83831490.

The previous prime is 83831483. The next prime is 83831497. The reversal of 83831491 is 19413838.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83831491 - 2³ = 83831483 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83831491.

It is not a weakly prime, because it can be changed into another prime (83831497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41915745 + 41915746.

It is an arithmetic number, because the mean of its divisors is an integer number (41915746).

Almost surely, 2^83831491 is an apocalyptic number.

83831491 is a deficient number, since it is larger than the sum of its proper divisors (1).

83831491 is an equidigital number, since it uses as much as digits as its factorization.

83831491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 83831491 is about 9155.9538552791. The cubic root of 83831491 is about 437.6588654077.

The spelling of 83831491 in words is "eighty-three million, eight hundred thirty-one thousand, four hundred ninety-one".