11990047 has 4 divisors (see below), whose sum is σ = 12001600. Its totient is φ = 11978496.

The previous prime is 11990023. The next prime is 11990051. The reversal of 11990047 is 74009911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74009911 = 503 ⋅147137.

It is a cyclic number.

It is not a de Polignac number, because 11990047 - 2⁷ = 11989919 is a prime.

It is a super-2 number, since 2×11990047² = 287522454124418, which contains 22 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 (11990947) 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, 4047 + ... + 6352.

It is an arithmetic number, because the mean of its divisors is an integer number (3000400).

Almost surely, 2^11990047 is an apocalyptic number.

11990047 is a deficient number, since it is larger than the sum of its proper divisors (11553).

11990047 is a wasteful number, since it uses less digits than its factorization.

11990047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 11990047 is about 3462.6647253235. The cubic root of 11990047 is about 228.8795346648.

Adding to 11990047 its reverse (74009911), we get a palindrome (85999958).

The spelling of 11990047 in words is "eleven million, nine hundred ninety thousand, forty-seven".