90449689 has 8 divisors (see below), whose sum is σ = 98812800. Its totient is φ = 82110000.

The previous prime is 90449659. The next prime is 90449693. The reversal of 90449689 is 98694409.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90449689 is a prime.

It is a super-2 number, since 2×90449689² = 16362292480393442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90449659) 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, 2787 + ... + 13735.

It is an arithmetic number, because the mean of its divisors is an integer number (12351600).

Almost surely, 2^90449689 is an apocalyptic number.

It is an amenable number.

90449689 is a deficient number, since it is larger than the sum of its proper divisors (8363111).

90449689 is a wasteful number, since it uses less digits than its factorization.

90449689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 90449689 is about 9510.5041401600. The cubic root of 90449689 is about 448.8856195800.

The spelling of 90449689 in words is "ninety million, four hundred forty-nine thousand, six hundred eighty-nine".