90233861 has 8 divisors (see below), whose sum is σ = 92802840. Its totient is φ = 87671808.

The previous prime is 90233837. The next prime is 90233863. The reversal of 90233861 is 16833209.

It can be written as a sum of positive squares in 4 ways, for example, as 49350625 + 40883236 = 7025^2 + 6394^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90233861 - 2²² = 86039557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90233863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36125 + ... + 38541.

It is an arithmetic number, because the mean of its divisors is an integer number (11600355).

Almost surely, 2^90233861 is an apocalyptic number.

It is an amenable number.

90233861 is a deficient number, since it is larger than the sum of its proper divisors (2568979).

90233861 is a wasteful number, since it uses less digits than its factorization.

90233861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90233861 is about 9499.1505409694. The cubic root of 90233861 is about 448.5282966387.

The spelling of 90233861 in words is "ninety million, two hundred thirty-three thousand, eight hundred sixty-one".