83970831 has 16 divisors (see below), whose sum is σ = 130055168. Its totient is φ = 47196000.

The previous prime is 83970827. The next prime is 83970833. The reversal of 83970831 is 13807938.

It is not a de Polignac number, because 83970831 - 2² = 83970827 is a prime.

It is a super-2 number, since 2×83970831² = 14102200917661122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83970831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83970833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31495 + ... + 34056.

It is an arithmetic number, because the mean of its divisors is an integer number (8128448).

Almost surely, 2^83970831 is an apocalyptic number.

83970831 is a deficient number, since it is larger than the sum of its proper divisors (46084337).

83970831 is a wasteful number, since it uses less digits than its factorization.

83970831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65622.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 83970831 is about 9163.5599523329. The cubic root of 83970831 is about 437.9012151859.

The spelling of 83970831 in words is "eighty-three million, nine hundred seventy thousand, eight hundred thirty-one".