78992567 has 2 divisors, whose sum is σ = 78992568. Its totient is φ = 78992566.

The previous prime is 78992513. The next prime is 78992579. The reversal of 78992567 is 76529987.

It is a strong prime.

It is an emirp because it is prime and its reverse (76529987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78992567 - 2¹² = 78988471 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 (78992587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39496283 + 39496284.

It is an arithmetic number, because the mean of its divisors is an integer number (39496284).

Almost surely, 2^78992567 is an apocalyptic number.

78992567 is a deficient number, since it is larger than the sum of its proper divisors (1).

78992567 is an equidigital number, since it uses as much as digits as its factorization.

78992567 is an odious number, because the sum of its binary digits is odd.

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

The square root of 78992567 is about 8887.7762685612. The cubic root of 78992567 is about 429.0705849738.

The spelling of 78992567 in words is "seventy-eight million, nine hundred ninety-two thousand, five hundred sixty-seven".