90288361 has 4 divisors (see below), whose sum is σ = 95040400. Its totient is φ = 85536324.

The previous prime is 90288353. The next prime is 90288403. The reversal of 90288361 is 16388209.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16388209 = 193 ⋅84913.

It is a cyclic number.

It is not a de Polignac number, because 90288361 - 2³ = 90288353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90288361.

It is not an unprimeable number, because it can be changed into a prime (90288301) 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, 2375991 + ... + 2376028.

It is an arithmetic number, because the mean of its divisors is an integer number (23760100).

Almost surely, 2^90288361 is an apocalyptic number.

It is an amenable number.

90288361 is a deficient number, since it is larger than the sum of its proper divisors (4752039).

90288361 is a wasteful number, since it uses less digits than its factorization.

90288361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752038.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 90288361 is about 9502.0187855003. The cubic root of 90288361 is about 448.6185800870.

The spelling of 90288361 in words is "ninety million, two hundred eighty-eight thousand, three hundred sixty-one".