78925771 has 2 divisors, whose sum is σ = 78925772. Its totient is φ = 78925770.

The previous prime is 78925739. The next prime is 78925789. The reversal of 78925771 is 17752987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78925771 - 2⁵ = 78925739 is a prime.

It is not a weakly prime, because it can be changed into another prime (78925571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39462885 + 39462886.

It is an arithmetic number, because the mean of its divisors is an integer number (39462886).

Almost surely, 2^78925771 is an apocalyptic number.

78925771 is a deficient number, since it is larger than the sum of its proper divisors (1).

78925771 is an equidigital number, since it uses as much as digits as its factorization.

78925771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 46.

The square root of 78925771 is about 8884.0177284830. The cubic root of 78925771 is about 428.9496103808.

The spelling of 78925771 in words is "seventy-eight million, nine hundred twenty-five thousand, seven hundred seventy-one".