1729429989 has 32 divisors (see below), whose sum is σ = 2781511680. Its totient is φ = 933705792.

The previous prime is 1729429981. The next prime is 1729429991. The reversal of 1729429989 is 9899249271.

It is not a de Polignac number, because 1729429989 - 2³ = 1729429981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729429981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147159 + ... + 158475.

It is an arithmetic number, because the mean of its divisors is an integer number (86922240).

Almost surely, 2^1729429989 is an apocalyptic number.

1729429989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1729429989 is a deficient number, since it is larger than the sum of its proper divisors (1052081691).

1729429989 is a wasteful number, since it uses less digits than its factorization.

1729429989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729.

The product of its digits is 5878656, while the sum is 60.

The square root of 1729429989 is about 41586.4159191436. The cubic root of 1729429989 is about 1200.3309247045.

The spelling of 1729429989 in words is "one billion, seven hundred twenty-nine million, four hundred twenty-nine thousand, nine hundred eighty-nine".