11989747 has 16 divisors (see below), whose sum is σ = 15270912. Its totient is φ = 9141120.

The previous prime is 11989727. The next prime is 11989763. The reversal of 11989747 is 74798911.

It is a cyclic number.

It is not a de Polignac number, because 11989747 - 2²³ = 3601139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11989697 and 11989706.

It is not an unprimeable number, because it can be changed into a prime (11989727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1963 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (954432).

Almost surely, 2^11989747 is an apocalyptic number.

11989747 is a deficient number, since it is larger than the sum of its proper divisors (3281165).

11989747 is a wasteful number, since it uses less digits than its factorization.

11989747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

The product of its digits is 127008, while the sum is 46.

The square root of 11989747 is about 3462.6214058138. The cubic root of 11989747 is about 228.8776257362.

The spelling of 11989747 in words is "eleven million, nine hundred eighty-nine thousand, seven hundred forty-seven".