78326159 has 2 divisors, whose sum is σ = 78326160. Its totient is φ = 78326158.

The previous prime is 78326029. The next prime is 78326179. The reversal of 78326159 is 95162387.

It is a strong prime.

It is an emirp because it is prime and its reverse (95162387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78326159 - 2⁸ = 78325903 is a prime.

It is a super-2 number, since 2×78326159² = 12269974367386562, which contains 22 as substring.

It is a Sophie Germain 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 (78326179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39163079 + 39163080.

It is an arithmetic number, because the mean of its divisors is an integer number (39163080).

Almost surely, 2^78326159 is an apocalyptic number.

78326159 is a deficient number, since it is larger than the sum of its proper divisors (1).

78326159 is an equidigital number, since it uses as much as digits as its factorization.

78326159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 78326159 is about 8850.2067207495. The cubic root of 78326159 is about 427.8605810638.

The spelling of 78326159 in words is "seventy-eight million, three hundred twenty-six thousand, one hundred fifty-nine".