11720047 has 2 divisors, whose sum is σ = 11720048. Its totient is φ = 11720046.

The previous prime is 11720039. The next prime is 11720053. The reversal of 11720047 is 74002711.

It is a strong prime.

It is an emirp because it is prime and its reverse (74002711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11720047 - 2³ = 11720039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11720057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860023 + 5860024.

It is an arithmetic number, because the mean of its divisors is an integer number (5860024).

Almost surely, 2^11720047 is an apocalyptic number.

11720047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11720047 is an equidigital number, since it uses as much as digits as its factorization.

11720047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 11720047 is about 3423.4554181412. The cubic root of 11720047 is about 227.1484535475.

Adding to 11720047 its reverse (74002711), we get a palindrome (85722758).

It can be divided in two parts, 1172004 and 7, that multiplied together give a palindrome (8204028).

The spelling of 11720047 in words is "eleven million, seven hundred twenty thousand, forty-seven".