11863945 has 4 divisors (see below), whose sum is σ = 14236740. Its totient is φ = 9491152.

The previous prime is 11863933. The next prime is 11863963. The reversal of 11863945 is 54936811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54936811 = 23 ⋅2388557.

It can be written as a sum of positive squares in 2 ways, for example, as 4096576 + 7767369 = 2024^2 + 2787^2 .

It is a cyclic number.

It is not a de Polignac number, because 11863945 - 2²¹ = 9766793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1186390 + ... + 1186399.

It is an arithmetic number, because the mean of its divisors is an integer number (3559185).

Almost surely, 2^11863945 is an apocalyptic number.

It is an amenable number.

11863945 is a deficient number, since it is larger than the sum of its proper divisors (2372795).

11863945 is an equidigital number, since it uses as much as digits as its factorization.

11863945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372794.

The product of its digits is 25920, while the sum is 37.

The square root of 11863945 is about 3444.4077865433. The cubic root of 11863945 is about 228.0743127519.

The spelling of 11863945 in words is "eleven million, eight hundred sixty-three thousand, nine hundred forty-five".