83057509 has 4 divisors (see below), whose sum is σ = 83178400. Its totient is φ = 82936620.

The previous prime is 83057503. The next prime is 83057543. The reversal of 83057509 is 90575038.

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 not a de Polignac number, because 83057509 - 2³ = 83057501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83057501) 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, 59409 + ... + 60790.

It is an arithmetic number, because the mean of its divisors is an integer number (20794600).

Almost surely, 2^83057509 is an apocalyptic number.

It is an amenable number.

83057509 is a deficient number, since it is larger than the sum of its proper divisors (120891).

83057509 is a wasteful number, since it uses less digits than its factorization.

83057509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120890.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 83057509 is about 9113.5892490281. The cubic root of 83057509 is about 436.3077902002.

The spelling of 83057509 in words is "eighty-three million, fifty-seven thousand, five hundred nine".