11947387 has 2 divisors, whose sum is σ = 11947388. Its totient is φ = 11947386.

The previous prime is 11947367. The next prime is 11947417. The reversal of 11947387 is 78374911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11947387 - 2¹⁵ = 11914619 is a prime.

It is a super-2 number, since 2×11947387² = 285480112255538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11947367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5973693 + 5973694.

It is an arithmetic number, because the mean of its divisors is an integer number (5973694).

Almost surely, 2^11947387 is an apocalyptic number.

11947387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11947387 is an equidigital number, since it uses as much as digits as its factorization.

11947387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 11947387 is about 3456.4992405612. The cubic root of 11947387 is about 228.6077647032.

The spelling of 11947387 in words is "eleven million, nine hundred forty-seven thousand, three hundred eighty-seven".