90518449 has 16 divisors (see below), whose sum is σ = 106957440. Its totient is φ = 75000960.

The previous prime is 90518431. The next prime is 90518471. The reversal of 90518449 is 94481509.

It is a cyclic number.

It is not a de Polignac number, because 90518449 - 2¹¹ = 90516401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90518479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23397 + ... + 26989.

It is an arithmetic number, because the mean of its divisors is an integer number (6684840).

Almost surely, 2^90518449 is an apocalyptic number.

It is an amenable number.

90518449 is a deficient number, since it is larger than the sum of its proper divisors (16438991).

90518449 is a wasteful number, since it uses less digits than its factorization.

90518449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 90518449 is about 9514.1184037198. The cubic root of 90518449 is about 448.9993386266. Note that the first 3 decimals are identical.

The spelling of 90518449 in words is "ninety million, five hundred eighteen thousand, four hundred forty-nine".