1729364221 has 8 divisors (see below), whose sum is σ = 1926613080. Its totient is φ = 1541289792.

The previous prime is 1729364167. The next prime is 1729364237. The reversal of 1729364221 is 1224639271.

It can be written as a sum of positive squares in 4 ways, for example, as 461648196 + 1267716025 = 21486^2 + 35605^2 .

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 1729364221 - 2⁷ = 1729364093 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 (1729364291) 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, 2293210 + ... + 2293963.

It is an arithmetic number, because the mean of its divisors is an integer number (240826635).

Almost surely, 2^1729364221 is an apocalyptic number.

It is an amenable number.

1729364221 is a deficient number, since it is larger than the sum of its proper divisors (197248859).

1729364221 is a wasteful number, since it uses less digits than its factorization.

1729364221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587215.

The product of its digits is 36288, while the sum is 37.

The square root of 1729364221 is about 41585.6251726483. The cubic root of 1729364221 is about 1200.3157088308.

The spelling of 1729364221 in words is "one billion, seven hundred twenty-nine million, three hundred sixty-four thousand, two hundred twenty-one".