83513891 has 2 divisors, whose sum is σ = 83513892. Its totient is φ = 83513890.

The previous prime is 83513863. The next prime is 83513923. The reversal of 83513891 is 19831538.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83513891 - 2⁶ = 83513827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83513831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41756945 + 41756946.

It is an arithmetic number, because the mean of its divisors is an integer number (41756946).

Almost surely, 2^83513891 is an apocalyptic number.

83513891 is a deficient number, since it is larger than the sum of its proper divisors (1).

83513891 is an equidigital number, since it uses as much as digits as its factorization.

83513891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 83513891 is about 9138.5934913421. The cubic root of 83513891 is about 437.1054681055.

The spelling of 83513891 in words is "eighty-three million, five hundred thirteen thousand, eight hundred ninety-one".