90509611 has 4 divisors (see below), whose sum is σ = 90558000. Its totient is φ = 90461224.

The previous prime is 90509579. The next prime is 90509641. The reversal of 90509611 is 11690509.

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 90509611 - 2⁵ = 90509579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90509641) 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, 21271 + ... + 25168.

It is an arithmetic number, because the mean of its divisors is an integer number (22639500).

Almost surely, 2^90509611 is an apocalyptic number.

90509611 is a deficient number, since it is larger than the sum of its proper divisors (48389).

90509611 is a wasteful number, since it uses less digits than its factorization.

90509611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48388.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 90509611 is about 9513.6539247547. The cubic root of 90509611 is about 448.9847250852.

The spelling of 90509611 in words is "ninety million, five hundred nine thousand, six hundred eleven".