11720447 has 2 divisors, whose sum is σ = 11720448. Its totient is φ = 11720446.

The previous prime is 11720431. The next prime is 11720483. The reversal of 11720447 is 74402711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11720447 - 2⁴ = 11720431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11720407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860223 + 5860224.

It is an arithmetic number, because the mean of its divisors is an integer number (5860224).

Almost surely, 2^11720447 is an apocalyptic number.

11720447 is a deficient number, since it is larger than the sum of its proper divisors (1).

11720447 is an equidigital number, since it uses as much as digits as its factorization.

11720447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 11720447 is about 3423.5138381493. The cubic root of 11720447 is about 227.1510376767.

It can be divided in two parts, 11720 and 447, that added together give a cube (12167 = 23³).

The spelling of 11720447 in words is "eleven million, seven hundred twenty thousand, four hundred forty-seven".