78900377 has 2 divisors, whose sum is σ = 78900378. Its totient is φ = 78900376.

The previous prime is 78900361. The next prime is 78900421. The reversal of 78900377 is 77300987.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57592921 + 21307456 = 7589^2 + 4616^2 .

It is a cyclic number.

It is not a de Polignac number, because 78900377 - 2⁴ = 78900361 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78900307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39450188 + 39450189.

It is an arithmetic number, because the mean of its divisors is an integer number (39450189).

Almost surely, 2^78900377 is an apocalyptic number.

It is an amenable number.

78900377 is a deficient number, since it is larger than the sum of its proper divisors (1).

78900377 is an equidigital number, since it uses as much as digits as its factorization.

78900377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 78900377 is about 8882.5884177980. The cubic root of 78900377 is about 428.9036012649.

The spelling of 78900377 in words is "seventy-eight million, nine hundred thousand, three hundred seventy-seven".