2145447047 has 2 divisors, whose sum is σ = 2145447048. Its totient is φ = 2145447046.

The previous prime is 2145446981. The next prime is 2145447053. The reversal of 2145447047 is 7407445412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145447047 - 2¹² = 2145442951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145447047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145447077) 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, 1072723523 + 1072723524.

It is an arithmetic number, because the mean of its divisors is an integer number (1072723524).

Almost surely, 2^2145447047 is an apocalyptic number.

2145447047 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145447047 is an equidigital number, since it uses as much as digits as its factorization.

2145447047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 38.

The square root of 2145447047 is about 46318.9707031579. The cubic root of 2145447047 is about 1289.7511782976.

The spelling of 2145447047 in words is "two billion, one hundred forty-five million, four hundred forty-seven thousand, forty-seven".