83159509 has 4 divisors (see below), whose sum is σ = 83177920. Its totient is φ = 83141100.

The previous prime is 83159507. The next prime is 83159519. The reversal of 83159509 is 90595138.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90595138 = 2 ⋅45297569.

It is a cyclic number.

It is not a de Polignac number, because 83159509 - 2¹ = 83159507 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 (83159507) 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, 2722 + ... + 13180.

It is an arithmetic number, because the mean of its divisors is an integer number (20794480).

Almost surely, 2^83159509 is an apocalyptic number.

It is an amenable number.

83159509 is a deficient number, since it is larger than the sum of its proper divisors (18411).

83159509 is a wasteful number, since it uses less digits than its factorization.

83159509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18410.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 83159509 is about 9119.1835709125. The cubic root of 83159509 is about 436.4863218782.

The spelling of 83159509 in words is "eighty-three million, one hundred fifty-nine thousand, five hundred nine".