1729697141 has 6 divisors (see below), whose sum is σ = 1789573590. Its totient is φ = 1669836168.

The previous prime is 1729697119. The next prime is 1729697153. The reversal of 1729697141 is 1417969271.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1491118225 + 238578916 = 38615^2 + 15446^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1729697141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729697191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220106 + ... + 227828.

It is an arithmetic number, because the mean of its divisors is an integer number (298262265).

Almost surely, 2^1729697141 is an apocalyptic number.

It is an amenable number.

1729697141 is a deficient number, since it is larger than the sum of its proper divisors (59876449).

1729697141 is an frugal number, since it uses more digits than its factorization.

1729697141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15475 (or 7752 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 1729697141 is about 41589.6278054998. The cubic root of 1729697141 is about 1200.3927281694.

The spelling of 1729697141 in words is "one billion, seven hundred twenty-nine million, six hundred ninety-seven thousand, one hundred forty-one".