13649489 has 6 divisors (see below), whose sum is σ = 15878034. Its totient is φ = 11699520.

The previous prime is 13649483. The next prime is 13649491. The reversal of 13649489 is 98494631.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 1399489 = 3500^2 + 1183^2 .

It is not a de Polignac number, because 13649489 - 2¹² = 13645393 is a prime.

It is a super-2 number, since 2×13649489² = 372617099922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13649483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139232 + ... + 139329.

It is an arithmetic number, because the mean of its divisors is an integer number (2646339).

Almost surely, 2^13649489 is an apocalyptic number.

It is an amenable number.

13649489 is a deficient number, since it is larger than the sum of its proper divisors (2228545).

13649489 is an equidigital number, since it uses as much as digits as its factorization.

13649489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278575 (or 278568 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 13649489 is about 3694.5214845769. The cubic root of 13649489 is about 238.9858187345.

The spelling of 13649489 in words is "thirteen million, six hundred forty-nine thousand, four hundred eighty-nine".