83591089 has 4 divisors (see below), whose sum is σ = 87990640. Its totient is φ = 79191540.

The previous prime is 83591003. The next prime is 83591093. The reversal of 83591089 is 98019538.

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-83591089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83591099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2199747 + ... + 2199784.

It is an arithmetic number, because the mean of its divisors is an integer number (21997660).

Almost surely, 2^83591089 is an apocalyptic number.

It is an amenable number.

83591089 is a deficient number, since it is larger than the sum of its proper divisors (4399551).

83591089 is a wasteful number, since it uses less digits than its factorization.

83591089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399550.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 83591089 is about 9142.8162510246. The cubic root of 83591089 is about 437.2401094831.

The spelling of 83591089 in words is "eighty-three million, five hundred ninety-one thousand, eighty-nine".