78890725723 has 2 divisors, whose sum is σ = 78890725724. Its totient is φ = 78890725722.

The previous prime is 78890725709. The next prime is 78890725757. The reversal of 78890725723 is 32752709887.

It is a weak prime.

It is an emirp because it is prime and its reverse (32752709887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78890725723 - 2⁹ = 78890725211 is a prime.

It is a super-2 number, since 2×78890725723² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78890725783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39445362861 + 39445362862.

It is an arithmetic number, because the mean of its divisors is an integer number (39445362862).

Almost surely, 2^78890725723 is an apocalyptic number.

78890725723 is a deficient number, since it is larger than the sum of its proper divisors (1).

78890725723 is an equidigital number, since it uses as much as digits as its factorization.

78890725723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11854080, while the sum is 58.

The spelling of 78890725723 in words is "seventy-eight billion, eight hundred ninety million, seven hundred twenty-five thousand, seven hundred twenty-three".