1729161749 has 8 divisors (see below), whose sum is σ = 2092431168. Its totient is φ = 1394953920.

The previous prime is 1729161719. The next prime is 1729161751. The reversal of 1729161749 is 9471619271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1729161749 - 2¹² = 1729157653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1729161719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7265267 + ... + 7265504.

It is an arithmetic number, because the mean of its divisors is an integer number (261553896).

Almost surely, 2^1729161749 is an apocalyptic number.

It is an amenable number.

1729161749 is a deficient number, since it is larger than the sum of its proper divisors (363269419).

1729161749 is a wasteful number, since it uses less digits than its factorization.

1729161749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14530795.

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

The square root of 1729161749 is about 41583.1907024942. The cubic root of 1729161749 is about 1200.2688631356.

The spelling of 1729161749 in words is "one billion, seven hundred twenty-nine million, one hundred sixty-one thousand, seven hundred forty-nine".