11641647 has 16 divisors (see below), whose sum is σ = 16148480. Its totient is φ = 7452000.

The previous prime is 11641639. The next prime is 11641681. The reversal of 11641647 is 74614611.

It is not a de Polignac number, because 11641647 - 2³ = 11641639 is a prime.

It is a super-3 number, since 3×11641647³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641687) 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 15 ways as a sum of consecutive naturals, for example, 13629 + ... + 14457.

It is an arithmetic number, because the mean of its divisors is an integer number (1009280).

Almost surely, 2^11641647 is an apocalyptic number.

11641647 is a deficient number, since it is larger than the sum of its proper divisors (4506833).

11641647 is a wasteful number, since it uses less digits than its factorization.

11641647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its digits is 4032, while the sum is 30.

The square root of 11641647 is about 3411.9857854335. The cubic root of 11641647 is about 226.6408248606.

The spelling of 11641647 in words is "eleven million, six hundred forty-one thousand, six hundred forty-seven".