78876701 has 2 divisors, whose sum is σ = 78876702. Its totient is φ = 78876700.

The previous prime is 78876689. The next prime is 78876703. The reversal of 78876701 is 10767887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75672601 + 3204100 = 8699^2 + 1790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78876701 is a prime.

It is a Sophie Germain prime.

Together with 78876703, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78876703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39438350 + 39438351.

It is an arithmetic number, because the mean of its divisors is an integer number (39438351).

Almost surely, 2^78876701 is an apocalyptic number.

It is an amenable number.

78876701 is a deficient number, since it is larger than the sum of its proper divisors (1).

78876701 is an equidigital number, since it uses as much as digits as its factorization.

78876701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 44.

The square root of 78876701 is about 8881.2555981685. The cubic root of 78876701 is about 428.8606959458.

The spelling of 78876701 in words is "seventy-eight million, eight hundred seventy-six thousand, seven hundred one".