83891197 has 8 divisors (see below), whose sum is σ = 90633816. Its totient is φ = 77189952.

The previous prime is 83891167. The next prime is 83891201. The reversal of 83891197 is 79119838.

It can be written as a sum of positive squares in 4 ways, for example, as 95481 + 83795716 = 309^2 + 9154^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83891197 - 2⁷ = 83891069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83891167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6058 + ... + 14299.

It is an arithmetic number, because the mean of its divisors is an integer number (11329227).

Almost surely, 2^83891197 is an apocalyptic number.

It is an amenable number.

83891197 is a deficient number, since it is larger than the sum of its proper divisors (6742619).

83891197 is a wasteful number, since it uses less digits than its factorization.

83891197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20687.

The product of its digits is 108864, while the sum is 46.

The square root of 83891197 is about 9159.2137763020. The cubic root of 83891197 is about 437.7627430745.

The spelling of 83891197 in words is "eighty-three million, eight hundred ninety-one thousand, one hundred ninety-seven".