2197729 has 8 divisors (see below), whose sum is σ = 2250080. Its totient is φ = 2146176.

The previous prime is 2197703. The next prime is 2197733. The reversal of 2197729 is 9277912.

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 2197729 - 2⁵ = 2197697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2197739) 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, 13402 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (281260).

2^2197729 is an apocalyptic number.

It is an amenable number.

2197729 is a deficient number, since it is larger than the sum of its proper divisors (52351).

2197729 is a wasteful number, since it uses less digits than its factorization.

2197729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399.

The product of its digits is 15876, while the sum is 37.

The square root of 2197729 is about 1482.4739458082. The cubic root of 2197729 is about 130.0143771082.

It can be divided in two parts, 2197 and 729, that multiplied together give a cube (1601613 = 117³).

The spelling of 2197729 in words is "two million, one hundred ninety-seven thousand, seven hundred twenty-nine".