78795839 has 2 divisors, whose sum is σ = 78795840. Its totient is φ = 78795838.

The previous prime is 78795817. The next prime is 78795911. The reversal of 78795839 is 93859787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78795839 - 2¹² = 78791743 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 (78795439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39397919 + 39397920.

It is an arithmetic number, because the mean of its divisors is an integer number (39397920).

Almost surely, 2^78795839 is an apocalyptic number.

78795839 is a deficient number, since it is larger than the sum of its proper divisors (1).

78795839 is an equidigital number, since it uses as much as digits as its factorization.

78795839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 56.

The square root of 78795839 is about 8876.7020339764. The cubic root of 78795839 is about 428.7140941805.

The spelling of 78795839 in words is "seventy-eight million, seven hundred ninety-five thousand, eight hundred thirty-nine".