78804377 has 2 divisors, whose sum is σ = 78804378. Its totient is φ = 78804376.

The previous prime is 78804347. The next prime is 78804403. The reversal of 78804377 is 77340887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44943616 + 33860761 = 6704^2 + 5819^2 .

It is a cyclic number.

It is not a de Polignac number, because 78804377 - 2¹⁶ = 78738841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78804307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39402188 + 39402189.

It is an arithmetic number, because the mean of its divisors is an integer number (39402189).

Almost surely, 2^78804377 is an apocalyptic number.

It is an amenable number.

78804377 is a deficient number, since it is larger than the sum of its proper divisors (1).

78804377 is an equidigital number, since it uses as much as digits as its factorization.

78804377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 78804377 is about 8877.1829428034. The cubic root of 78804377 is about 428.7295781992.

The spelling of 78804377 in words is "seventy-eight million, eight hundred four thousand, three hundred seventy-seven".