78994967 has 2 divisors, whose sum is σ = 78994968. Its totient is φ = 78994966.

The previous prime is 78994891. The next prime is 78994969. The reversal of 78994967 is 76949987.

It is a strong prime.

It is an emirp because it is prime and its reverse (76949987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78994967 - 2⁸ = 78994711 is a prime.

It is a super-2 number, since 2×78994967² = 12480409622662178, which contains 22 as substring.

Together with 78994969, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78994969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39497483 + 39497484.

It is an arithmetic number, because the mean of its divisors is an integer number (39497484).

Almost surely, 2^78994967 is an apocalyptic number.

78994967 is a deficient number, since it is larger than the sum of its proper divisors (1).

78994967 is an equidigital number, since it uses as much as digits as its factorization.

78994967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 59.

The square root of 78994967 is about 8887.9112844357. The cubic root of 78994967 is about 429.0749303573.

The spelling of 78994967 in words is "seventy-eight million, nine hundred ninety-four thousand, nine hundred sixty-seven".