90110231 has 2 divisors, whose sum is σ = 90110232. Its totient is φ = 90110230.

The previous prime is 90110227. The next prime is 90110249. The reversal of 90110231 is 13201109.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90110231 - 2² = 90110227 is a prime.

It is a super-2 number, since 2×90110231² = 16239707461746722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90110261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45055115 + 45055116.

It is an arithmetic number, because the mean of its divisors is an integer number (45055116).

Almost surely, 2^90110231 is an apocalyptic number.

90110231 is a deficient number, since it is larger than the sum of its proper divisors (1).

90110231 is an equidigital number, since it uses as much as digits as its factorization.

90110231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 90110231 is about 9492.6408864973. The cubic root of 90110231 is about 448.3233591691.

The spelling of 90110231 in words is "ninety million, one hundred ten thousand, two hundred thirty-one".