90499409 has 24 divisors (see below), whose sum is σ = 122445120. Its totient is φ = 65086560.

The previous prime is 90499399. The next prime is 90499433.

It is a happy number.

90499409 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90499409 - 2⁸ = 90499153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90499409.

It is not an unprimeable number, because it can be changed into a prime (90499439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6902 + ... + 15120.

It is an arithmetic number, because the mean of its divisors is an integer number (5101880).

Almost surely, 2^90499409 is an apocalyptic number.

It is an amenable number.

90499409 is a deficient number, since it is larger than the sum of its proper divisors (31945711).

90499409 is a wasteful number, since it uses less digits than its factorization.

90499409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8261 (or 8250 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 90499409 is about 9513.1177328991. The cubic root of 90499409 is about 448.9678550010.

The spelling of 90499409 in words is "ninety million, four hundred ninety-nine thousand, four hundred nine".