82364021 has 4 divisors (see below), whose sum is σ = 82404000. Its totient is φ = 82324044.

The previous prime is 82364017. The next prime is 82364027. The reversal of 82364021 is 12046328.

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 a cyclic number.

It is not a de Polignac number, because 82364021 - 2² = 82364017 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 (82364027) 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, 16721 + ... + 21078.

It is an arithmetic number, because the mean of its divisors is an integer number (20601000).

Almost surely, 2^82364021 is an apocalyptic number.

It is an amenable number.

82364021 is a deficient number, since it is larger than the sum of its proper divisors (39979).

82364021 is a wasteful number, since it uses less digits than its factorization.

82364021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39978.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 82364021 is about 9075.4625777422. The cubic root of 82364021 is about 435.0900786723.

The spelling of 82364021 in words is "eighty-two million, three hundred sixty-four thousand, twenty-one".