83685903 has 16 divisors (see below), whose sum is σ = 127660800. Its totient is φ = 47768256.

The previous prime is 83685863. The next prime is 83685913. The reversal of 83685903 is 30958638.

It is a Cunningham number, because it is equal to 9148²-1.

It is not a de Polignac number, because 83685903 - 2⁹ = 83685391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83685913) 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, 25923 + ... + 28971.

It is an arithmetic number, because the mean of its divisors is an integer number (7978800).

Almost surely, 2^83685903 is an apocalyptic number.

83685903 is a deficient number, since it is larger than the sum of its proper divisors (43974897).

83685903 is a wasteful number, since it uses less digits than its factorization.

83685903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 83685903 is about 9147.9999453432. Note that the first 4 decimals coincide. The cubic root of 83685903 is about 437.4053616249.

The spelling of 83685903 in words is "eighty-three million, six hundred eighty-five thousand, nine hundred three".