11947087 has 4 divisors (see below), whose sum is σ = 12149640. Its totient is φ = 11744536.

The previous prime is 11947081. The next prime is 11947123. The reversal of 11947087 is 78074911.

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 11947087 - 2³ = 11947079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11947081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101188 + ... + 101305.

It is an arithmetic number, because the mean of its divisors is an integer number (3037410).

Almost surely, 2^11947087 is an apocalyptic number.

11947087 is a deficient number, since it is larger than the sum of its proper divisors (202553).

11947087 is an equidigital number, since it uses as much as digits as its factorization.

11947087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202552.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 11947087 is about 3456.4558437799. The cubic root of 11947087 is about 228.6058512331.

It can be divided in two parts, 1194 and 7087, that added together give a square (8281 = 91²).

The spelling of 11947087 in words is "eleven million, nine hundred forty-seven thousand, eighty-seven".