1722429859 has 2 divisors, whose sum is σ = 1722429860. Its totient is φ = 1722429858.

The previous prime is 1722429853. The next prime is 1722429871. The reversal of 1722429859 is 9589242271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1722429859 - 2²⁵ = 1688875427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1722429853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861214929 + 861214930.

It is an arithmetic number, because the mean of its divisors is an integer number (861214930).

Almost surely, 2^1722429859 is an apocalyptic number.

1722429859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722429859 is an equidigital number, since it uses as much as digits as its factorization.

1722429859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 1722429859 is about 41502.1669193309. The cubic root of 1722429859 is about 1198.7092275959.

The spelling of 1722429859 in words is "one billion, seven hundred twenty-two million, four hundred twenty-nine thousand, eight hundred fifty-nine".