90102011 has 4 divisors (see below), whose sum is σ = 90641712. Its totient is φ = 89562312.

The previous prime is 90102007. The next prime is 90102029. The reversal of 90102011 is 11020109.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90102011 - 2² = 90102007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90102041) 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, 269600 + ... + 269933.

It is an arithmetic number, because the mean of its divisors is an integer number (22660428).

Almost surely, 2^90102011 is an apocalyptic number.

90102011 is a deficient number, since it is larger than the sum of its proper divisors (539701).

90102011 is a wasteful number, since it uses less digits than its factorization.

90102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539700.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 90102011 is about 9492.2079096488. The cubic root of 90102011 is about 448.3097264956.

The spelling of 90102011 in words is "ninety million, one hundred two thousand, eleven".