90490953173 has 2 divisors, whose sum is σ = 90490953174. Its totient is φ = 90490953172.

The previous prime is 90490953151. The next prime is 90490953253. The reversal of 90490953173 is 37135909409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89869847089 + 621106084 = 299783^2 + 24922^2 .

It is an emirp because it is prime and its reverse (37135909409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90490953173 - 2⁶ = 90490953109 is a prime.

It is a super-2 number, since 2×90490953173² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90490953473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45245476586 + 45245476587.

It is an arithmetic number, because the mean of its divisors is an integer number (45245476587).

Almost surely, 2^90490953173 is an apocalyptic number.

It is an amenable number.

90490953173 is a deficient number, since it is larger than the sum of its proper divisors (1).

90490953173 is an equidigital number, since it uses as much as digits as its factorization.

90490953173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 918540, while the sum is 50.

The spelling of 90490953173 in words is "ninety billion, four hundred ninety million, nine hundred fifty-three thousand, one hundred seventy-three".