82921039 has 4 divisors (see below), whose sum is σ = 82996920. Its totient is φ = 82845160.

The previous prime is 82921037. The next prime is 82921061. The reversal of 82921039 is 93012928.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82921039 - 2¹ = 82921037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82920995 and 82921013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82921037) 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, 36277 + ... + 38494.

It is an arithmetic number, because the mean of its divisors is an integer number (20749230).

Almost surely, 2^82921039 is an apocalyptic number.

82921039 is a deficient number, since it is larger than the sum of its proper divisors (75881).

82921039 is a wasteful number, since it uses less digits than its factorization.

82921039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75880.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 82921039 is about 9106.0990001207. The cubic root of 82921039 is about 436.0686965655.

The spelling of 82921039 in words is "eighty-two million, nine hundred twenty-one thousand, thirty-nine".