78956847 has 6 divisors (see below), whose sum is σ = 114048792. Its totient is φ = 52637892.

The previous prime is 78956831. The next prime is 78956863. The reversal of 78956847 is 74865987.

78956847 is a `hidden beast` number, since 78 + 9 + 568 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (78956831) and next prime (78956863).

It is not a de Polignac number, because 78956847 - 2⁴ = 78956831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78956793 and 78956802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78956807) 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, 4386483 + ... + 4386500.

It is an arithmetic number, because the mean of its divisors is an integer number (19008132).

Almost surely, 2^78956847 is an apocalyptic number.

78956847 is a deficient number, since it is larger than the sum of its proper divisors (35091945).

78956847 is a wasteful number, since it uses less digits than its factorization.

78956847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8772989 (or 8772986 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 78956847 is about 8885.7665398096. The cubic root of 78956847 is about 429.0059007779.

The spelling of 78956847 in words is "seventy-eight million, nine hundred fifty-six thousand, eight hundred forty-seven".