78959039 has 2 divisors, whose sum is σ = 78959040. Its totient is φ = 78959038.

The previous prime is 78959011. The next prime is 78959047. The reversal of 78959039 is 93095987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78959039 - 2⁸ = 78958783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78959009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39479519 + 39479520.

It is an arithmetic number, because the mean of its divisors is an integer number (39479520).

Almost surely, 2^78959039 is an apocalyptic number.

78959039 is a deficient number, since it is larger than the sum of its proper divisors (1).

78959039 is an equidigital number, since it uses as much as digits as its factorization.

78959039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 78959039 is about 8885.8898822797. The cubic root of 78959039 is about 429.0098707618.

The spelling of 78959039 in words is "seventy-eight million, nine hundred fifty-nine thousand, thirty-nine".