82931393 has 4 divisors (see below), whose sum is σ = 85172820. Its totient is φ = 80689968.

The previous prime is 82931383. The next prime is 82931437. The reversal of 82931393 is 39313928.

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 29246464 + 53684929 = 5408^2 + 7327^2 .

It is a cyclic number.

It is not a de Polignac number, because 82931393 - 2⁸ = 82931137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82931323) 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, 1120658 + ... + 1120731.

It is an arithmetic number, because the mean of its divisors is an integer number (21293205).

Almost surely, 2^82931393 is an apocalyptic number.

It is an amenable number.

82931393 is a deficient number, since it is larger than the sum of its proper divisors (2241427).

82931393 is a wasteful number, since it uses less digits than its factorization.

82931393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241426.

The product of its digits is 34992, while the sum is 38.

The square root of 82931393 is about 9106.6675024402. The cubic root of 82931393 is about 436.0868458290.

The spelling of 82931393 in words is "eighty-two million, nine hundred thirty-one thousand, three hundred ninety-three".