78045659 has 2 divisors, whose sum is σ = 78045660. Its totient is φ = 78045658.

The previous prime is 78045619. The next prime is 78045661. The reversal of 78045659 is 95654087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78045659 - 2⁸ = 78045403 is a prime.

It is a super-2 number, since 2×78045659² = 12182249777488562, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 78045661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78045619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39022829 + 39022830.

It is an arithmetic number, because the mean of its divisors is an integer number (39022830).

Almost surely, 2^78045659 is an apocalyptic number.

78045659 is a deficient number, since it is larger than the sum of its proper divisors (1).

78045659 is an equidigital number, since it uses as much as digits as its factorization.

78045659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 78045659 is about 8834.3454200071. The cubic root of 78045659 is about 427.3492217037.

The spelling of 78045659 in words is "seventy-eight million, forty-five thousand, six hundred fifty-nine".