78130863 has 6 divisors (see below), whose sum is σ = 112855704. Its totient is φ = 52087236.

The previous prime is 78130859. The next prime is 78130879. The reversal of 78130863 is 36803187.

It is not a de Polignac number, because 78130863 - 2² = 78130859 is a prime.

It is a super-2 number, since 2×78130863² = 12208863506249538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78130823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4340595 + ... + 4340612.

It is an arithmetic number, because the mean of its divisors is an integer number (18809284).

Almost surely, 2^78130863 is an apocalyptic number.

78130863 is a deficient number, since it is larger than the sum of its proper divisors (34724841).

78130863 is a wasteful number, since it uses less digits than its factorization.

78130863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681213 (or 8681210 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 78130863 is about 8839.1664199742. The cubic root of 78130863 is about 427.5046803632.

The spelling of 78130863 in words is "seventy-eight million, one hundred thirty thousand, eight hundred sixty-three".