82193817 has 4 divisors (see below), whose sum is σ = 109591760. Its totient is φ = 54795876.

The previous prime is 82193809. The next prime is 82193843. The reversal of 82193817 is 71839128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 82193817 - 2³ = 82193809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82193887) 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, 13698967 + ... + 13698972.

It is an arithmetic number, because the mean of its divisors is an integer number (27397940).

Almost surely, 2^82193817 is an apocalyptic number.

It is an amenable number.

82193817 is a deficient number, since it is larger than the sum of its proper divisors (27397943).

82193817 is a wasteful number, since it uses less digits than its factorization.

82193817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27397942.

The product of its digits is 24192, while the sum is 39.

The square root of 82193817 is about 9066.0805754196. The cubic root of 82193817 is about 434.7901696423.

The spelling of 82193817 in words is "eighty-two million, one hundred ninety-three thousand, eight hundred seventeen".