78872723 has 2 divisors, whose sum is σ = 78872724. Its totient is φ = 78872722.

The previous prime is 78872719. The next prime is 78872747. The reversal of 78872723 is 32727887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78872723 - 2² = 78872719 is a prime.

It is not a weakly prime, because it can be changed into another prime (78872713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39436361 + 39436362.

It is an arithmetic number, because the mean of its divisors is an integer number (39436362).

Almost surely, 2^78872723 is an apocalyptic number.

78872723 is a deficient number, since it is larger than the sum of its proper divisors (1).

78872723 is an equidigital number, since it uses as much as digits as its factorization.

78872723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 44.

The square root of 78872723 is about 8881.0316405247. The cubic root of 78872723 is about 428.8534862269.

The spelling of 78872723 in words is "seventy-eight million, eight hundred seventy-two thousand, seven hundred twenty-three".