90988909 has 8 divisors (see below), whose sum is σ = 99541440. Its totient is φ = 82483200.

The previous prime is 90988867. The next prime is 90988939.

90988909 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90988909 - 2¹³ = 90980717 is a prime.

It is a super-2 number, since 2×90988909² = 16557963122020562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90988939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7572 + ... + 15469.

It is an arithmetic number, because the mean of its divisors is an integer number (12442680).

Almost surely, 2^90988909 is an apocalyptic number.

It is an amenable number.

90988909 is a deficient number, since it is larger than the sum of its proper divisors (8552531).

90988909 is a wasteful number, since it uses less digits than its factorization.

90988909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23411.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 90988909 is about 9538.8106700993. The cubic root of 90988909 is about 449.7758702801.

The spelling of 90988909 in words is "ninety million, nine hundred eighty-eight thousand, nine hundred nine".