9090549 has 40 divisors (see below), whose sum is σ = 14941080. Its totient is φ = 5474304.

The previous prime is 9090547. The next prime is 9090551. The reversal of 9090549 is 9450909.

It is an interprime number because it is at equal distance from previous prime (9090547) and next prime (9090551).

It can be written as a sum of positive squares in 4 ways, for example, as 324 + 9090225 = 18^2 + 3015^2 .

It is not a de Polignac number, because 9090549 - 2¹ = 9090547 is a prime.

It is a super-2 number, since 2×9090549² = 165276162242802, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090547) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 93669 + ... + 93765.

It is an arithmetic number, because the mean of its divisors is an integer number (373527).

Almost surely, 2^9090549 is an apocalyptic number.

It is an amenable number.

9090549 is a deficient number, since it is larger than the sum of its proper divisors (5850531).

9090549 is a wasteful number, since it uses less digits than its factorization.

9090549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 9090549 is about 3015.0537308645. The cubic root of 9090549 is about 208.7036465857.

The spelling of 9090549 in words is "nine million, ninety thousand, five hundred forty-nine".