11947897 has 8 divisors (see below), whose sum is σ = 12993344. Its totient is φ = 10920528.

The previous prime is 11947891. The next prime is 11947931. The reversal of 11947897 is 79874911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11947897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11947891) 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, 3123 + ... + 5800.

It is an arithmetic number, because the mean of its divisors is an integer number (1624168).

Almost surely, 2^11947897 is an apocalyptic number.

It is an amenable number.

11947897 is a deficient number, since it is larger than the sum of its proper divisors (1045447).

11947897 is a wasteful number, since it uses less digits than its factorization.

11947897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9039.

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

The square root of 11947897 is about 3456.5730138390. The cubic root of 11947897 is about 228.6110175289.

The spelling of 11947897 in words is "eleven million, nine hundred forty-seven thousand, eight hundred ninety-seven".