83391885 has 48 divisors (see below), whose sum is σ = 155428416. Its totient is φ = 41209344.

The previous prime is 83391857. The next prime is 83391911. The reversal of 83391885 is 58819338.

It is not a de Polignac number, because 83391885 - 2⁷ = 83391757 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 83391885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50442 + ... + 52068.

It is an arithmetic number, because the mean of its divisors is an integer number (3238092).

Almost surely, 2^83391885 is an apocalyptic number.

83391885 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

83391885 is a deficient number, since it is larger than the sum of its proper divisors (72036531).

83391885 is a wasteful number, since it uses less digits than its factorization.

83391885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 1719 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 83391885 is about 9131.9157354851. The cubic root of 83391885 is about 436.8925076027.

The spelling of 83391885 in words is "eighty-three million, three hundred ninety-one thousand, eight hundred eighty-five".