90101111 has 2 divisors, whose sum is σ = 90101112. Its totient is φ = 90101110.

The previous prime is 90101107. The next prime is 90101129. The reversal of 90101111 is 11110109.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (11110109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90101111 - 2² = 90101107 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90101101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45050555 + 45050556.

It is an arithmetic number, because the mean of its divisors is an integer number (45050556).

Almost surely, 2^90101111 is an apocalyptic number.

90101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

90101111 is an equidigital number, since it uses as much as digits as its factorization.

90101111 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 14.

The square root of 90101111 is about 9492.1605022250. The cubic root of 90101111 is about 448.3082338167.

The spelling of 90101111 in words is "ninety million, one hundred one thousand, one hundred eleven".