90881723 has 2 divisors, whose sum is σ = 90881724. Its totient is φ = 90881722.

The previous prime is 90881689. The next prime is 90881743. The reversal of 90881723 is 32718809.

It is a strong prime.

It is an emirp because it is prime and its reverse (32718809) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90881723 is a prime.

It is not a weakly prime, because it can be changed into another prime (90881743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45440861 + 45440862.

It is an arithmetic number, because the mean of its divisors is an integer number (45440862).

Almost surely, 2^90881723 is an apocalyptic number.

90881723 is a deficient number, since it is larger than the sum of its proper divisors (1).

90881723 is an equidigital number, since it uses as much as digits as its factorization.

90881723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 90881723 is about 9533.1905991646. The cubic root of 90881723 is about 449.5991871368.

The spelling of 90881723 in words is "ninety million, eight hundred eighty-one thousand, seven hundred twenty-three".