83909513 has 2 divisors, whose sum is σ = 83909514. Its totient is φ = 83909512.

The previous prime is 83909509. The next prime is 83909533. The reversal of 83909513 is 31590938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63234304 + 20675209 = 7952^2 + 4547^2 .

It is a cyclic number.

It is not a de Polignac number, because 83909513 - 2² = 83909509 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83909503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41954756 + 41954757.

It is an arithmetic number, because the mean of its divisors is an integer number (41954757).

Almost surely, 2^83909513 is an apocalyptic number.

It is an amenable number.

83909513 is a deficient number, since it is larger than the sum of its proper divisors (1).

83909513 is an equidigital number, since it uses as much as digits as its factorization.

83909513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 83909513 is about 9160.2135892129. The cubic root of 83909513 is about 437.7945997303.

The spelling of 83909513 in words is "eighty-three million, nine hundred nine thousand, five hundred thirteen".