83331690 has 64 divisors (see below), whose sum is σ = 218405376. Its totient is φ = 20224512.

The previous prime is 83331683. The next prime is 83331697. The reversal of 83331690 is 9613338.

It is an interprime number because it is at equal distance from previous prime (83331683) and next prime (83331697).

It is a super-2 number, since 2×83331690² = 13888341116512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83331697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27007 + ... + 29933.

It is an arithmetic number, because the mean of its divisors is an integer number (3412584).

Almost surely, 2^83331690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83331690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109202688).

83331690 is an abundant number, since it is smaller than the sum of its proper divisors (135073686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83331690 is a wasteful number, since it uses less digits than its factorization.

83331690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 83331690 is about 9128.6192822354. The cubic root of 83331690 is about 436.7873611815.

It can be divided in two parts, 833 and 31690, that added together give a palindrome (32523).

The spelling of 83331690 in words is "eighty-three million, three hundred thirty-one thousand, six hundred ninety".