83681775 has 24 divisors (see below), whose sum is σ = 153727760. Its totient is φ = 44629920.

The previous prime is 83681743. The next prime is 83681783. The reversal of 83681775 is 57718638.

It is not a de Polignac number, because 83681775 - 2⁵ = 83681743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 83681775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61312 + ... + 62661.

Almost surely, 2^83681775 is an apocalyptic number.

83681775 is a deficient number, since it is larger than the sum of its proper divisors (70045985).

83681775 is a wasteful number, since it uses less digits than its factorization.

83681775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123992 (or 123981 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 83681775 is about 9147.7743194725. The cubic root of 83681775 is about 437.3981694975.

The spelling of 83681775 in words is "eighty-three million, six hundred eighty-one thousand, seven hundred seventy-five".