83239021 has 8 divisors (see below), whose sum is σ = 90011520. Its totient is φ = 76675008.

The previous prime is 83239007. The next prime is 83239027. The reversal of 83239021 is 12093238.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83239021 - 2⁷ = 83238893 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 (83239027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51291 + ... + 52888.

It is an arithmetic number, because the mean of its divisors is an integer number (11251440).

Almost surely, 2^83239021 is an apocalyptic number.

It is an amenable number.

83239021 is a deficient number, since it is larger than the sum of its proper divisors (6772499).

83239021 is a wasteful number, since it uses less digits than its factorization.

83239021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104243.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 83239021 is about 9123.5421301159. The cubic root of 83239021 is about 436.6253913424.

The spelling of 83239021 in words is "eighty-three million, two hundred thirty-nine thousand, twenty-one".