11949947 has 4 divisors (see below), whose sum is σ = 11967696. Its totient is φ = 11932200.

The previous prime is 11949937. The next prime is 11949953. The reversal of 11949947 is 74994911.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11949947 - 2¹⁴ = 11933563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11949898 and 11949907.

It is not an unprimeable number, because it can be changed into a prime (11949937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7823 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (2991924).

Almost surely, 2^11949947 is an apocalyptic number.

11949947 is a deficient number, since it is larger than the sum of its proper divisors (17749).

11949947 is an equidigital number, since it uses as much as digits as its factorization.

11949947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17748.

The product of its digits is 81648, while the sum is 44.

The square root of 11949947 is about 3456.8695376019. The cubic root of 11949947 is about 228.6240916787.

The spelling of 11949947 in words is "eleven million, nine hundred forty-nine thousand, nine hundred forty-seven".