83247839 has 2 divisors, whose sum is σ = 83247840. Its totient is φ = 83247838.

The previous prime is 83247823. The next prime is 83247847. The reversal of 83247839 is 93874238.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83247839 - 2⁴ = 83247823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83247839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83247809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41623919 + 41623920.

It is an arithmetic number, because the mean of its divisors is an integer number (41623920).

Almost surely, 2^83247839 is an apocalyptic number.

83247839 is a deficient number, since it is larger than the sum of its proper divisors (1).

83247839 is an equidigital number, since it uses as much as digits as its factorization.

83247839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 83247839 is about 9124.0253726083. The cubic root of 83247839 is about 436.6408088982.

The spelling of 83247839 in words is "eighty-three million, two hundred forty-seven thousand, eight hundred thirty-nine".