4447661447 has 2 divisors, whose sum is σ = 4447661448. Its totient is φ = 4447661446.

The previous prime is 4447661443. The next prime is 4447661459. The reversal of 4447661447 is 7441667444.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4447661447 - 2² = 4447661443 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4447661443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2223830723 + 2223830724.

It is an arithmetic number, because the mean of its divisors is an integer number (2223830724).

Almost surely, 2^4447661447 is an apocalyptic number.

4447661447 is a deficient number, since it is larger than the sum of its proper divisors (1).

4447661447 is an equidigital number, since it uses as much as digits as its factorization.

4447661447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 47.

The square root of 4447661447 is about 66690.7898213839. The cubic root of 4447661447 is about 1644.5379777411.

The spelling of 4447661447 in words is "four billion, four hundred forty-seven million, six hundred sixty-one thousand, four hundred forty-seven".