82365921 has 48 divisors (see below), whose sum is σ = 137884032. Its totient is φ = 46886400.

The previous prime is 82365919. The next prime is 82365961. The reversal of 82365921 is 12956328.

It is not a de Polignac number, because 82365921 - 2¹ = 82365919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82365911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138601 + ... + 139193.

It is an arithmetic number, because the mean of its divisors is an integer number (2872584).

Almost surely, 2^82365921 is an apocalyptic number.

It is an amenable number.

82365921 is a deficient number, since it is larger than the sum of its proper divisors (55518111).

82365921 is a wasteful number, since it uses less digits than its factorization.

82365921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 691 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 82365921 is about 9075.5672549984. The cubic root of 82365921 is about 435.0934242463.

The spelling of 82365921 in words is "eighty-two million, three hundred sixty-five thousand, nine hundred twenty-one".