2172340447 has 2 divisors, whose sum is σ = 2172340448. Its totient is φ = 2172340446.

The previous prime is 2172340441. The next prime is 2172340459. The reversal of 2172340447 is 7440432712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2172340447 - 2¹⁵ = 2172307679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172340441) 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, 1086170223 + 1086170224.

It is an arithmetic number, because the mean of its divisors is an integer number (1086170224).

Almost surely, 2^2172340447 is an apocalyptic number.

2172340447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172340447 is an equidigital number, since it uses as much as digits as its factorization.

2172340447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 34.

The square root of 2172340447 is about 46608.3731426017. The cubic root of 2172340447 is about 1295.1178710359.

The spelling of 2172340447 in words is "two billion, one hundred seventy-two million, three hundred forty thousand, four hundred forty-seven".