90193253 has 4 divisors (see below), whose sum is σ = 90587340. Its totient is φ = 89799168.

The previous prime is 90193183. The next prime is 90193261. The reversal of 90193253 is 35239109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35239109 = 277 ⋅127217.

It can be written as a sum of positive squares in 2 ways, for example, as 39967684 + 50225569 = 6322^2 + 7087^2 .

It is a cyclic number.

It is not a de Polignac number, because 90193253 - 2⁸ = 90192997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90192253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196700 + ... + 197157.

It is an arithmetic number, because the mean of its divisors is an integer number (22646835).

Almost surely, 2^90193253 is an apocalyptic number.

It is an amenable number.

90193253 is a deficient number, since it is larger than the sum of its proper divisors (394087).

90193253 is a wasteful number, since it uses less digits than its factorization.

90193253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394086.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 90193253 is about 9497.0128461533. The cubic root of 90193253 is about 448.4610027211.

The spelling of 90193253 in words is "ninety million, one hundred ninety-three thousand, two hundred fifty-three".