11657649 has 8 divisors (see below), whose sum is σ = 15798592. Its totient is φ = 7644240.

The previous prime is 11657641. The next prime is 11657663. The reversal of 11657649 is 94675611.

11657649 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11657649 - 2³ = 11657641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11657641) 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, 31669 + ... + 32034.

It is an arithmetic number, because the mean of its divisors is an integer number (1974824).

Almost surely, 2^11657649 is an apocalyptic number.

It is an amenable number.

11657649 is a deficient number, since it is larger than the sum of its proper divisors (4140943).

11657649 is an equidigital number, since it uses as much as digits as its factorization.

11657649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63767.

The product of its digits is 45360, while the sum is 39.

The square root of 11657649 is about 3414.3299489065. The cubic root of 11657649 is about 226.7446201985.

The spelling of 11657649 in words is "eleven million, six hundred fifty-seven thousand, six hundred forty-nine".