83837989 has 16 divisors (see below), whose sum is σ = 88623360. Its totient is φ = 79223040.

The previous prime is 83837987. The next prime is 83838011. The reversal of 83837989 is 98973838.

It is a cyclic number.

It is not a de Polignac number, because 83837989 - 2¹ = 83837987 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 (83837987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267697 + ... + 268009.

It is an arithmetic number, because the mean of its divisors is an integer number (5538960).

Almost surely, 2^83837989 is an apocalyptic number.

It is an amenable number.

83837989 is a deficient number, since it is larger than the sum of its proper divisors (4785371).

83837989 is a wasteful number, since it uses less digits than its factorization.

83837989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its digits is 2612736, while the sum is 55.

The square root of 83837989 is about 9156.3086994705. The cubic root of 83837989 is about 437.6701731466.

The spelling of 83837989 in words is "eighty-three million, eight hundred thirty-seven thousand, nine hundred eighty-nine".