824145247 has 2 divisors, whose sum is σ = 824145248. Its totient is φ = 824145246.

The previous prime is 824145241. The next prime is 824145277. The reversal of 824145247 is 742541428.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-824145247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (824145241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412072623 + 412072624.

It is an arithmetic number, because the mean of its divisors is an integer number (412072624).

Almost surely, 2^824145247 is an apocalyptic number.

824145247 is a deficient number, since it is larger than the sum of its proper divisors (1).

824145247 is an equidigital number, since it uses as much as digits as its factorization.

824145247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71680, while the sum is 37.

The square root of 824145247 is about 28707.9300368383. The cubic root of 824145247 is about 937.5647114324.

The spelling of 824145247 in words is "eight hundred twenty-four million, one hundred forty-five thousand, two hundred forty-seven".