11699971 has 2 divisors, whose sum is σ = 11699972. Its totient is φ = 11699970.

The previous prime is 11699969. The next prime is 11699993. The reversal of 11699971 is 17999611.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11699971 - 2¹ = 11699969 is a prime.

Together with 11699969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11699911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5849985 + 5849986.

It is an arithmetic number, because the mean of its divisors is an integer number (5849986).

Almost surely, 2^11699971 is an apocalyptic number.

11699971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11699971 is an equidigital number, since it uses as much as digits as its factorization.

11699971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 43.

The square root of 11699971 is about 3420.5220361810. The cubic root of 11699971 is about 227.0186804993.

The spelling of 11699971 in words is "eleven million, six hundred ninety-nine thousand, nine hundred seventy-one".