2190729 has 8 divisors (see below), whose sum is σ = 2970720. Its totient is φ = 1435616.

The previous prime is 2190691. The next prime is 2190737. The reversal of 2190729 is 9270912.

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 2190729 - 2⁸ = 2190473 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2190696 and 2190705.

It is not an unprimeable number, because it can be changed into a prime (2190329) 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, 6012 + ... + 6365.

It is an arithmetic number, because the mean of its divisors is an integer number (371340).

2^2190729 is an apocalyptic number.

It is an amenable number.

2190729 is a deficient number, since it is larger than the sum of its proper divisors (779991).

2190729 is a wasteful number, since it uses less digits than its factorization.

2190729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12439.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2190729 is about 1480.1111444753. Note that the first 4 decimals coincide. The cubic root of 2190729 is about 129.8761937669.

The spelling of 2190729 in words is "two million, one hundred ninety thousand, seven hundred twenty-nine".