78620159 has 2 divisors, whose sum is σ = 78620160. Its totient is φ = 78620158.

The previous prime is 78620111. The next prime is 78620161. The reversal of 78620159 is 95102687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78620159 - 2²⁰ = 77571583 is a prime.

It is a super-2 number, since 2×78620159² = 12362258802370562, which contains 22 as substring.

Together with 78620161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78620459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39310079 + 39310080.

It is an arithmetic number, because the mean of its divisors is an integer number (39310080).

Almost surely, 2^78620159 is an apocalyptic number.

78620159 is a deficient number, since it is larger than the sum of its proper divisors (1).

78620159 is an equidigital number, since it uses as much as digits as its factorization.

78620159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 78620159 is about 8866.8009450985. The cubic root of 78620159 is about 428.3952425903.

The spelling of 78620159 in words is "seventy-eight million, six hundred twenty thousand, one hundred fifty-nine".