82313197 has 4 divisors (see below), whose sum is σ = 84537916. Its totient is φ = 80088480.

The previous prime is 82313177. The next prime is 82313213. The reversal of 82313197 is 79131328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79316836 + 2996361 = 8906^2 + 1731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82313197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82313177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112304 + ... + 1112377.

It is an arithmetic number, because the mean of its divisors is an integer number (21134479).

Almost surely, 2^82313197 is an apocalyptic number.

It is an amenable number.

82313197 is a deficient number, since it is larger than the sum of its proper divisors (2224719).

82313197 is a wasteful number, since it uses less digits than its factorization.

82313197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224718.

The product of its digits is 9072, while the sum is 34.

The square root of 82313197 is about 9072.6620679931. The cubic root of 82313197 is about 435.0005672252. Note that the first 3 decimals are identical.

The spelling of 82313197 in words is "eighty-two million, three hundred thirteen thousand, one hundred ninety-seven".