82317945 has 16 divisors (see below), whose sum is σ = 131947200. Its totient is φ = 43823424.

The previous prime is 82317941. The next prime is 82317947. The reversal of 82317945 is 54971328.

It is not a de Polignac number, because 82317945 - 2² = 82317941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82317941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4131 + ... + 13479.

It is an arithmetic number, because the mean of its divisors is an integer number (8246700).

Almost surely, 2^82317945 is an apocalyptic number.

It is an amenable number.

82317945 is a deficient number, since it is larger than the sum of its proper divisors (49629255).

82317945 is a wasteful number, since it uses less digits than its factorization.

82317945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9944.

The product of its digits is 60480, while the sum is 39.

The square root of 82317945 is about 9072.9237294270. The cubic root of 82317945 is about 435.0089309832.

The spelling of 82317945 in words is "eighty-two million, three hundred seventeen thousand, nine hundred forty-five".