78946859 has 2 divisors, whose sum is σ = 78946860. Its totient is φ = 78946858.

The previous prime is 78946823. The next prime is 78946867. The reversal of 78946859 is 95864987.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78946859 is a prime.

It is a super-3 number, since 3×78946859³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (78946459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39473429 + 39473430.

It is an arithmetic number, because the mean of its divisors is an integer number (39473430).

Almost surely, 2^78946859 is an apocalyptic number.

78946859 is a deficient number, since it is larger than the sum of its proper divisors (1).

78946859 is an equidigital number, since it uses as much as digits as its factorization.

78946859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 56.

The square root of 78946859 is about 8885.2044996162. The cubic root of 78946859 is about 428.9878103408.

The spelling of 78946859 in words is "seventy-eight million, nine hundred forty-six thousand, eight hundred fifty-nine".