90303661 has 4 divisors (see below), whose sum is σ = 103204192. Its totient is φ = 77403132.

The previous prime is 90303649. The next prime is 90303691. The reversal of 90303661 is 16630309.

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 a cyclic number.

It is not a de Polignac number, because 90303661 - 2⁷ = 90303533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90303691) 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, 6450255 + ... + 6450268.

It is an arithmetic number, because the mean of its divisors is an integer number (25801048).

Almost surely, 2^90303661 is an apocalyptic number.

It is an amenable number.

90303661 is a deficient number, since it is larger than the sum of its proper divisors (12900531).

90303661 is a wasteful number, since it uses less digits than its factorization.

90303661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12900530.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 90303661 is about 9502.8238434688. The cubic root of 90303661 is about 448.6439191840.

The spelling of 90303661 in words is "ninety million, three hundred three thousand, six hundred sixty-one".