78486047 has 2 divisors, whose sum is σ = 78486048. Its totient is φ = 78486046.

The previous prime is 78486043. The next prime is 78486049. The reversal of 78486047 is 74068487.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78486047 - 2² = 78486043 is a prime.

Together with 78486049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78485989 and 78486007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78486043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39243023 + 39243024.

It is an arithmetic number, because the mean of its divisors is an integer number (39243024).

Almost surely, 2^78486047 is an apocalyptic number.

78486047 is a deficient number, since it is larger than the sum of its proper divisors (1).

78486047 is an equidigital number, since it uses as much as digits as its factorization.

78486047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 78486047 is about 8859.2351249981. The cubic root of 78486047 is about 428.1515152704.

The spelling of 78486047 in words is "seventy-eight million, four hundred eighty-six thousand, forty-seven".