83749889 has 8 divisors (see below), whose sum is σ = 85655232. Its totient is φ = 81861840.

The previous prime is 83749873. The next prime is 83749903. The reversal of 83749889 is 98894738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83749889 - 2⁴ = 83749873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83749829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732 + ... + 14154.

It is an arithmetic number, because the mean of its divisors is an integer number (10706904).

Almost surely, 2^83749889 is an apocalyptic number.

It is an amenable number.

83749889 is a deficient number, since it is larger than the sum of its proper divisors (1905343).

83749889 is a wasteful number, since it uses less digits than its factorization.

83749889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8647.

The product of its digits is 3483648, while the sum is 56.

The square root of 83749889 is about 9151.4965442817. The cubic root of 83749889 is about 437.5168128505.

The spelling of 83749889 in words is "eighty-three million, seven hundred forty-nine thousand, eight hundred eighty-nine".