78101047 has 2 divisors, whose sum is σ = 78101048. Its totient is φ = 78101046.

The previous prime is 78101027. The next prime is 78101071. The reversal of 78101047 is 74010187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78101047 - 2²³ = 69712439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78101027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39050523 + 39050524.

It is an arithmetic number, because the mean of its divisors is an integer number (39050524).

Almost surely, 2^78101047 is an apocalyptic number.

78101047 is a deficient number, since it is larger than the sum of its proper divisors (1).

78101047 is an equidigital number, since it uses as much as digits as its factorization.

78101047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 78101047 is about 8837.4796746584. The cubic root of 78101047 is about 427.4502925459.

The spelling of 78101047 in words is "seventy-eight million, one hundred one thousand, forty-seven".