83438905 has 16 divisors (see below), whose sum is σ = 109672704. Its totient is φ = 60436480.

The previous prime is 83438893. The next prime is 83438933. The reversal of 83438905 is 50983438.

It is not a de Polignac number, because 83438905 - 2¹⁵ = 83406137 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian 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, 11184 + ... + 17086.

It is an arithmetic number, because the mean of its divisors is an integer number (6854544).

Almost surely, 2^83438905 is an apocalyptic number.

It is an amenable number.

83438905 is a deficient number, since it is larger than the sum of its proper divisors (26233799).

83438905 is a wasteful number, since it uses less digits than its factorization.

83438905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 83438905 is about 9134.4898598663. The cubic root of 83438905 is about 436.9746052231.

The spelling of 83438905 in words is "eighty-three million, four hundred thirty-eight thousand, nine hundred five".