78268159 has 2 divisors, whose sum is σ = 78268160. Its totient is φ = 78268158.

The previous prime is 78268147. The next prime is 78268181. The reversal of 78268159 is 95186287.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78268159 is a prime.

It is a super-2 number, since 2×78268159² = 12251809426498562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78268109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39134079 + 39134080.

It is an arithmetic number, because the mean of its divisors is an integer number (39134080).

Almost surely, 2^78268159 is an apocalyptic number.

78268159 is a deficient number, since it is larger than the sum of its proper divisors (1).

78268159 is an equidigital number, since it uses as much as digits as its factorization.

78268159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 46.

The square root of 78268159 is about 8846.9293543014. The cubic root of 78268159 is about 427.7549456802.

The spelling of 78268159 in words is "seventy-eight million, two hundred sixty-eight thousand, one hundred fifty-nine".