90836449 has 4 divisors (see below), whose sum is σ = 99094320. Its totient is φ = 82578580.

The previous prime is 90836441. The next prime is 90836467. The reversal of 90836449 is 94463809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94463809 = 11 ⋅8587619.

It is a cyclic number.

It is not a de Polignac number, because 90836449 - 2³ = 90836441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90836441) 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 3 ways as a sum of consecutive naturals, for example, 4128919 + ... + 4128940.

It is an arithmetic number, because the mean of its divisors is an integer number (24773580).

Almost surely, 2^90836449 is an apocalyptic number.

It is an amenable number.

90836449 is a deficient number, since it is larger than the sum of its proper divisors (8257871).

90836449 is a wasteful number, since it uses less digits than its factorization.

90836449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8257870.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 90836449 is about 9530.8157573211. The cubic root of 90836449 is about 449.5245166973.

The spelling of 90836449 in words is "ninety million, eight hundred thirty-six thousand, four hundred forty-nine".