83513857 has 4 divisors (see below), whose sum is σ = 95444416. Its totient is φ = 71583300.

The previous prime is 83513831. The next prime is 83513863. The reversal of 83513857 is 75831538.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83513857 is a prime.

It is a super-2 number, since 2×83513857² = 13949128622032898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83513827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5965269 + ... + 5965282.

It is an arithmetic number, because the mean of its divisors is an integer number (23861104).

Almost surely, 2^83513857 is an apocalyptic number.

It is an amenable number.

83513857 is a deficient number, since it is larger than the sum of its proper divisors (11930559).

83513857 is a wasteful number, since it uses less digits than its factorization.

83513857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11930558.

The product of its digits is 100800, while the sum is 40.

The square root of 83513857 is about 9138.5916310994. The cubic root of 83513857 is about 437.1054087876.

The spelling of 83513857 in words is "eighty-three million, five hundred thirteen thousand, eight hundred fifty-seven".