90011 has 2 divisors, whose sum is σ = 90012. Its totient is φ = 90010.

The previous prime is 90007. The next prime is 90017. The reversal of 90011 is 11009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90011 - 2² = 90007 is a prime.

It is a Sophie Germain prime.

90011 is a modest number, since divided by 11 gives 9 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 89974 and 90001.

It is not a weakly prime, because it can be changed into another prime (90017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45005 + 45006.

It is an arithmetic number, because the mean of its divisors is an integer number (45006).

2⁹⁰⁰¹¹ is an apocalyptic number.

90011 is a deficient number, since it is larger than the sum of its proper divisors (1).

90011 is an equidigital number, since it uses as much as digits as its factorization.

90011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 11.

The square root of 90011 is about 300.0183327732. The cubic root of 90011 is about 44.8158731487.

Subtracting from 90011 its sum of digits (11), we obtain a square (90000 = 300²).

The spelling of 90011 in words is "ninety thousand, eleven".