2381729 has 8 divisors (see below), whose sum is σ = 2753280. Its totient is φ = 2018016.

The previous prime is 2381693. The next prime is 2381737. The reversal of 2381729 is 9271832.

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

It is not a de Polignac number, because 2381729 - 2⁸ = 2381473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2381695 and 2381704.

It is not an unprimeable number, because it can be changed into a prime (2381749) 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, 1289 + ... + 2534.

It is an arithmetic number, because the mean of its divisors is an integer number (344160).

2^2381729 is an apocalyptic number.

It is an amenable number.

2381729 is a deficient number, since it is larger than the sum of its proper divisors (371551).

2381729 is an equidigital number, since it uses as much as digits as its factorization.

2381729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919.

The product of its digits is 6048, while the sum is 32.

The square root of 2381729 is about 1543.2851324366. The cubic root of 2381729 is about 133.5459683562.

The spelling of 2381729 in words is "two million, three hundred eighty-one thousand, seven hundred twenty-nine".