90990725723 has 2 divisors, whose sum is σ = 90990725724. Its totient is φ = 90990725722.

The previous prime is 90990725719. The next prime is 90990725741. The reversal of 90990725723 is 32752709909.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32752709909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90990725723 - 2² = 90990725719 is a prime.

It is not a weakly prime, because it can be changed into another prime (90990725123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45495362861 + 45495362862.

It is an arithmetic number, because the mean of its divisors is an integer number (45495362862).

Almost surely, 2^90990725723 is an apocalyptic number.

90990725723 is a deficient number, since it is larger than the sum of its proper divisors (1).

90990725723 is an equidigital number, since it uses as much as digits as its factorization.

90990725723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The spelling of 90990725723 in words is "ninety billion, nine hundred ninety million, seven hundred twenty-five thousand, seven hundred twenty-three".