90233661 has 16 divisors (see below), whose sum is σ = 140853888. Its totient is φ = 50304000.

The previous prime is 90233659. The next prime is 90233711. The reversal of 90233661 is 16633209.

It is a happy number.

It is not a de Polignac number, because 90233661 - 2¹ = 90233659 is a prime.

It is a super-2 number, since 2×90233661² = 16284227154925842, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90233461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51540 + ... + 53261.

It is an arithmetic number, because the mean of its divisors is an integer number (8803368).

Almost surely, 2^90233661 is an apocalyptic number.

It is an amenable number.

90233661 is a deficient number, since it is larger than the sum of its proper divisors (50620227).

90233661 is a wasteful number, since it uses less digits than its factorization.

90233661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104852.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 90233661 is about 9499.1400137065. The cubic root of 90233661 is about 448.5279652564.

The spelling of 90233661 in words is "ninety million, two hundred thirty-three thousand, six hundred sixty-one".