78676747 has 2 divisors, whose sum is σ = 78676748. Its totient is φ = 78676746.

The previous prime is 78676727. The next prime is 78676753. The reversal of 78676747 is 74767687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78676747 - 2¹⁵ = 78643979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78676694 and 78676703.

It is not a weakly prime, because it can be changed into another prime (78676727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39338373 + 39338374.

It is an arithmetic number, because the mean of its divisors is an integer number (39338374).

Almost surely, 2^78676747 is an apocalyptic number.

78676747 is a deficient number, since it is larger than the sum of its proper divisors (1).

78676747 is an equidigital number, since it uses as much as digits as its factorization.

78676747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2765952, while the sum is 52.

The square root of 78676747 is about 8869.9913754186. The cubic root of 78676747 is about 428.4979991710.

The spelling of 78676747 in words is "seventy-eight million, six hundred seventy-six thousand, seven hundred forty-seven".