83989405 has 16 divisors (see below), whose sum is σ = 107078400. Its totient is φ = 63063360.

The previous prime is 83989387. The next prime is 83989429. The reversal of 83989405 is 50498938.

It is not a de Polignac number, because 83989405 - 2¹¹ = 83987357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6300 + ... + 14410.

It is an arithmetic number, because the mean of its divisors is an integer number (6692400).

Almost surely, 2^83989405 is an apocalyptic number.

It is an amenable number.

83989405 is a deficient number, since it is larger than the sum of its proper divisors (23088995).

83989405 is a wasteful number, since it uses less digits than its factorization.

83989405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 83989405 is about 9164.5733670477. The cubic root of 83989405 is about 437.9335001172.

The spelling of 83989405 in words is "eighty-three million, nine hundred eighty-nine thousand, four hundred five".