78952729 has 2 divisors, whose sum is σ = 78952730. Its totient is φ = 78952728.

The previous prime is 78952717. The next prime is 78952739. The reversal of 78952729 is 92725987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 26245129 = 7260^2 + 5123^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78952729 is a prime.

It is not a weakly prime, because it can be changed into another prime (78952739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39476364 + 39476365.

It is an arithmetic number, because the mean of its divisors is an integer number (39476365).

Almost surely, 2^78952729 is an apocalyptic number.

It is an amenable number.

78952729 is a deficient number, since it is larger than the sum of its proper divisors (1).

78952729 is an equidigital number, since it uses as much as digits as its factorization.

78952729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 78952729 is about 8885.5348178936. The cubic root of 78952729 is about 428.9984423704.

The spelling of 78952729 in words is "seventy-eight million, nine hundred fifty-two thousand, seven hundred twenty-nine".