90909011 has 4 divisors (see below), whose sum is σ = 90936912. Its totient is φ = 90881112.

The previous prime is 90908959. The next prime is 90909031. The reversal of 90909011 is 11090909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11090909 = 881 ⋅12589.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90909011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90909031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8300 + ... + 15833.

It is an arithmetic number, because the mean of its divisors is an integer number (22734228).

Almost surely, 2^90909011 is an apocalyptic number.

90909011 is a deficient number, since it is larger than the sum of its proper divisors (27901).

90909011 is a wasteful number, since it uses less digits than its factorization.

90909011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27900.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 90909011 is about 9534.6217019869. The cubic root of 90909011 is about 449.6441812768.

The spelling of 90909011 in words is "ninety million, nine hundred nine thousand, eleven".