90288823169 has 2 divisors, whose sum is σ = 90288823170. Its totient is φ = 90288823168.

The previous prime is 90288823147. The next prime is 90288823189. The reversal of 90288823169 is 96132888209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88499110144 + 1789713025 = 297488^2 + 42305^2 .

It is a cyclic number.

It is not a de Polignac number, because 90288823169 - 2¹⁶ = 90288757633 is a prime.

It is a super-2 number, since 2×90288823169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90288823189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45144411584 + 45144411585.

It is an arithmetic number, because the mean of its divisors is an integer number (45144411585).

Almost surely, 2^90288823169 is an apocalyptic number.

It is an amenable number.

90288823169 is a deficient number, since it is larger than the sum of its proper divisors (1).

90288823169 is an equidigital number, since it uses as much as digits as its factorization.

90288823169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 90288823169 in words is "ninety billion, two hundred eighty-eight million, eight hundred twenty-three thousand, one hundred sixty-nine".