90503173 has 2 divisors, whose sum is σ = 90503174. Its totient is φ = 90503172.

The previous prime is 90503129. The next prime is 90503191. The reversal of 90503173 is 37130509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75742209 + 14760964 = 8703^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 90503173 - 2¹³ = 90494981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90503123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45251586 + 45251587.

It is an arithmetic number, because the mean of its divisors is an integer number (45251587).

Almost surely, 2^90503173 is an apocalyptic number.

It is an amenable number.

90503173 is a deficient number, since it is larger than the sum of its proper divisors (1).

90503173 is an equidigital number, since it uses as much as digits as its factorization.

90503173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 90503173 is about 9513.3155629360. The cubic root of 90503173 is about 448.9740793200.

The spelling of 90503173 in words is "ninety million, five hundred three thousand, one hundred seventy-three".