13457649 has 4 divisors (see below), whose sum is σ = 17943536. Its totient is φ = 8971764.

The previous prime is 13457629. The next prime is 13457713. The reversal of 13457649 is 94675431.

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.

It is not a de Polignac number, because 13457649 - 2⁹ = 13457137 is a prime.

It is a super-2 number, since 2×13457649² = 362216633214402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13457629) 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, 2242939 + ... + 2242944.

It is an arithmetic number, because the mean of its divisors is an integer number (4485884).

Almost surely, 2^13457649 is an apocalyptic number.

It is an amenable number.

13457649 is a deficient number, since it is larger than the sum of its proper divisors (4485887).

13457649 is an equidigital number, since it uses as much as digits as its factorization.

13457649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485886.

The product of its digits is 90720, while the sum is 39.

The square root of 13457649 is about 3668.4668459726. The cubic root of 13457649 is about 237.8609042940.

The spelling of 13457649 in words is "thirteen million, four hundred fifty-seven thousand, six hundred forty-nine".