83021893 has 2 divisors, whose sum is σ = 83021894. Its totient is φ = 83021892.

The previous prime is 83021857. The next prime is 83021923. The reversal of 83021893 is 39812038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70862724 + 12159169 = 8418^2 + 3487^2 .

It is a cyclic number.

It is not a de Polignac number, because 83021893 - 2²⁵ = 49467461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83021593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41510946 + 41510947.

It is an arithmetic number, because the mean of its divisors is an integer number (41510947).

Almost surely, 2^83021893 is an apocalyptic number.

It is an amenable number.

83021893 is a deficient number, since it is larger than the sum of its proper divisors (1).

83021893 is an equidigital number, since it uses as much as digits as its factorization.

83021893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 83021893 is about 9111.6350343942. The cubic root of 83021893 is about 436.2454167109.

The spelling of 83021893 in words is "eighty-three million, twenty-one thousand, eight hundred ninety-three".