90941231 has 2 divisors, whose sum is σ = 90941232. Its totient is φ = 90941230.

The previous prime is 90941219. The next prime is 90941237. The reversal of 90941231 is 13214909.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13214909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90941231 - 2¹⁰ = 90940207 is a prime.

It is a super-2 number, since 2×90941231² = 16540614991590722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90941194 and 90941203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90941237) 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, 45470615 + 45470616.

It is an arithmetic number, because the mean of its divisors is an integer number (45470616).

Almost surely, 2^90941231 is an apocalyptic number.

90941231 is a deficient number, since it is larger than the sum of its proper divisors (1).

90941231 is an equidigital number, since it uses as much as digits as its factorization.

90941231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 90941231 is about 9536.3111841005. The cubic root of 90941231 is about 449.6972960126.

The spelling of 90941231 in words is "ninety million, nine hundred forty-one thousand, two hundred thirty-one".