83157989 has 4 divisors (see below), whose sum is σ = 83230656. Its totient is φ = 83085324.

The previous prime is 83157973. The next prime is 83158021. The reversal of 83157989 is 98975138.

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 83157989 - 2⁴ = 83157973 is a prime.

It is a super-3 number, since 3×83157989³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83157929) 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, 34589 + ... + 36914.

It is an arithmetic number, because the mean of its divisors is an integer number (20807664).

Almost surely, 2^83157989 is an apocalyptic number.

It is an amenable number.

83157989 is a deficient number, since it is larger than the sum of its proper divisors (72667).

83157989 is a wasteful number, since it uses less digits than its factorization.

83157989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72666.

The product of its digits is 544320, while the sum is 50.

The square root of 83157989 is about 9119.1002297376. The cubic root of 83157989 is about 436.4836624779.

The spelling of 83157989 in words is "eighty-three million, one hundred fifty-seven thousand, nine hundred eighty-nine".