90802623523 has 2 divisors, whose sum is σ = 90802623524. Its totient is φ = 90802623522.

The previous prime is 90802623469. The next prime is 90802623547. The reversal of 90802623523 is 32532620809.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90802623523 is a prime.

It is not a weakly prime, because it can be changed into another prime (90802623563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45401311761 + 45401311762.

It is an arithmetic number, because the mean of its divisors is an integer number (45401311762).

Almost surely, 2^90802623523 is an apocalyptic number.

90802623523 is a deficient number, since it is larger than the sum of its proper divisors (1).

90802623523 is an equidigital number, since it uses as much as digits as its factorization.

90802623523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 90802623523 in words is "ninety billion, eight hundred two million, six hundred twenty-three thousand, five hundred twenty-three".