90921011 has 2 divisors, whose sum is σ = 90921012. Its totient is φ = 90921010.

The previous prime is 90920993. The next prime is 90921013. The reversal of 90921011 is 11012909.

It is a strong prime.

It is an emirp because it is prime and its reverse (11012909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90921011 is a prime.

Together with 90921013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90921013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45460505 + 45460506.

It is an arithmetic number, because the mean of its divisors is an integer number (45460506).

Almost surely, 2^90921011 is an apocalyptic number.

90921011 is a deficient number, since it is larger than the sum of its proper divisors (1).

90921011 is an equidigital number, since it uses as much as digits as its factorization.

90921011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 90921011 is about 9535.2509668073. The cubic root of 90921011 is about 449.6639647677.

The spelling of 90921011 in words is "ninety million, nine hundred twenty-one thousand, eleven".