83919839 has 2 divisors, whose sum is σ = 83919840. Its totient is φ = 83919838.

The previous prime is 83919817. The next prime is 83919853. The reversal of 83919839 is 93891938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83919839 - 2¹² = 83915743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83919809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41959919 + 41959920.

It is an arithmetic number, because the mean of its divisors is an integer number (41959920).

Almost surely, 2^83919839 is an apocalyptic number.

83919839 is a deficient number, since it is larger than the sum of its proper divisors (1).

83919839 is an equidigital number, since it uses as much as digits as its factorization.

83919839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 83919839 is about 9160.7772050192. Note that the first 3 decimals coincide. The cubic root of 83919839 is about 437.8125574939.

The spelling of 83919839 in words is "eighty-three million, nine hundred nineteen thousand, eight hundred thirty-nine".