78146863 has 2 divisors, whose sum is σ = 78146864. Its totient is φ = 78146862.

The previous prime is 78146843. The next prime is 78146869. The reversal of 78146863 is 36864187.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78146863 is a prime.

It is a super-2 number, since 2×78146863² = 12213864393481538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78146869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39073431 + 39073432.

It is an arithmetic number, because the mean of its divisors is an integer number (39073432).

Almost surely, 2^78146863 is an apocalyptic number.

78146863 is a deficient number, since it is larger than the sum of its proper divisors (1).

78146863 is an equidigital number, since it uses as much as digits as its factorization.

78146863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 78146863 is about 8840.0714363629. The cubic root of 78146863 is about 427.5338605010.

The spelling of 78146863 in words is "seventy-eight million, one hundred forty-six thousand, eight hundred sixty-three".