90551361 has 4 divisors (see below), whose sum is σ = 120735152. Its totient is φ = 60367572.

The previous prime is 90551327. The next prime is 90551387. The reversal of 90551361 is 16315509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90551361 - 2⁷ = 90551233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90551861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15091891 + ... + 15091896.

It is an arithmetic number, because the mean of its divisors is an integer number (30183788).

Almost surely, 2^90551361 is an apocalyptic number.

It is an amenable number.

90551361 is a deficient number, since it is larger than the sum of its proper divisors (30183791).

90551361 is a wasteful number, since it uses less digits than its factorization.

90551361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30183790.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 90551361 is about 9515.8478865522. The cubic root of 90551361 is about 449.0537499124.

The spelling of 90551361 in words is "ninety million, five hundred fifty-one thousand, three hundred sixty-one".