11977847 has 8 divisors (see below), whose sum is σ = 14409600. Its totient is φ = 9726264.

The previous prime is 11977829. The next prime is 11977859. The reversal of 11977847 is 74877911.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11977847 - 2¹⁶ = 11912311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11977798 and 11977807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11977807) 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, 44897 + ... + 45162.

It is an arithmetic number, because the mean of its divisors is an integer number (1801200).

Almost surely, 2^11977847 is an apocalyptic number.

11977847 is a deficient number, since it is larger than the sum of its proper divisors (2431753).

11977847 is an equidigital number, since it uses as much as digits as its factorization.

11977847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90085.

The product of its digits is 98784, while the sum is 44.

The square root of 11977847 is about 3460.9026279282. The cubic root of 11977847 is about 228.8018792024.

The spelling of 11977847 in words is "eleven million, nine hundred seventy-seven thousand, eight hundred forty-seven".