11694947987 has 2 divisors, whose sum is σ = 11694947988. Its totient is φ = 11694947986.

The previous prime is 11694947983. The next prime is 11694948011. The reversal of 11694947987 is 78974949611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11694947987 - 2² = 11694947983 is a prime.

It is not a weakly prime, because it can be changed into another prime (11694947983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5847473993 + 5847473994.

It is an arithmetic number, because the mean of its divisors is an integer number (5847473994).

Almost surely, 2^11694947987 is an apocalyptic number.

11694947987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11694947987 is an equidigital number, since it uses as much as digits as its factorization.

11694947987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 65.

The spelling of 11694947987 in words is "eleven billion, six hundred ninety-four million, nine hundred forty-seven thousand, nine hundred eighty-seven".