1729429991 has 2 divisors, whose sum is σ = 1729429992. Its totient is φ = 1729429990.

The previous prime is 1729429981. The next prime is 1729430011. The reversal of 1729429991 is 1999249271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1729429991 - 2³⁰ = 655688167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1729429981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864714995 + 864714996.

It is an arithmetic number, because the mean of its divisors is an integer number (864714996).

Almost surely, 2^1729429991 is an apocalyptic number.

1729429991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729429991 is an equidigital number, since it uses as much as digits as its factorization.

1729429991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The square root of 1729429991 is about 41586.4159431899. The cubic root of 1729429991 is about 1200.3309251672.

The spelling of 1729429991 in words is "one billion, seven hundred twenty-nine million, four hundred twenty-nine thousand, nine hundred ninety-one".