839272021 has 16 divisors (see below), whose sum is σ = 1003691008. Its totient is φ = 686620800.

The previous prime is 839272003. The next prime is 839272039. The reversal of 839272021 is 120272938.

It is an interprime number because it is at equal distance from previous prime (839272003) and next prime (839272039).

It is a cyclic number.

It is not a de Polignac number, because 839272021 - 2⁹ = 839271509 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 (839272321) 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, 10650 + ... + 42331.

It is an arithmetic number, because the mean of its divisors is an integer number (62730688).

Almost surely, 2^839272021 is an apocalyptic number.

It is an amenable number.

839272021 is a deficient number, since it is larger than the sum of its proper divisors (164418987).

839272021 is a wasteful number, since it uses less digits than its factorization.

839272021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53092.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 839272021 is about 28970.1919393020. The cubic root of 839272021 is about 943.2661472736.

The spelling of 839272021 in words is "eight hundred thirty-nine million, two hundred seventy-two thousand, twenty-one".