78672959 has 2 divisors, whose sum is σ = 78672960. Its totient is φ = 78672958.

The previous prime is 78672953. The next prime is 78672983. The reversal of 78672959 is 95927687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78672959 - 2⁴ = 78672943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78672959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78672953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39336479 + 39336480.

It is an arithmetic number, because the mean of its divisors is an integer number (39336480).

Almost surely, 2^78672959 is an apocalyptic number.

78672959 is a deficient number, since it is larger than the sum of its proper divisors (1).

78672959 is an equidigital number, since it uses as much as digits as its factorization.

78672959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 78672959 is about 8869.7778438921. Note that the first 3 decimals coincide. The cubic root of 78672959 is about 428.4911221858.

The spelling of 78672959 in words is "seventy-eight million, six hundred seventy-two thousand, nine hundred fifty-nine".