1728117101 has 8 divisors (see below), whose sum is σ = 1753061184. Its totient is φ = 1703207520.

The previous prime is 1728117091. The next prime is 1728117137. The reversal of 1728117101 is 1017118271.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1728117101 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 (1728117151) 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, 102470 + ... + 118136.

It is an arithmetic number, because the mean of its divisors is an integer number (219132648).

Almost surely, 2^1728117101 is an apocalyptic number.

It is an amenable number.

1728117101 is a deficient number, since it is larger than the sum of its proper divisors (24944083).

1728117101 is a wasteful number, since it uses less digits than its factorization.

1728117101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17251.

The product of its (nonzero) digits is 784, while the sum is 29.

The square root of 1728117101 is about 41570.6278639137. The cubic root of 1728117101 is about 1200.0271061007.

The spelling of 1728117101 in words is "one billion, seven hundred twenty-eight million, one hundred seventeen thousand, one hundred one".