78901967 has 2 divisors, whose sum is σ = 78901968. Its totient is φ = 78901966.

The previous prime is 78901951. The next prime is 78901997. The reversal of 78901967 is 76910987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78901967 - 2⁴ = 78901951 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78901997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39450983 + 39450984.

It is an arithmetic number, because the mean of its divisors is an integer number (39450984).

Almost surely, 2^78901967 is an apocalyptic number.

78901967 is a deficient number, since it is larger than the sum of its proper divisors (1).

78901967 is an equidigital number, since it uses as much as digits as its factorization.

78901967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 78901967 is about 8882.6779182857. The cubic root of 78901967 is about 428.9064823333.

The spelling of 78901967 in words is "seventy-eight million, nine hundred one thousand, nine hundred sixty-seven".