729451453 has 8 divisors (see below), whose sum is σ = 772738488. Its totient is φ = 686206464.

The previous prime is 729451451. The next prime is 729451493. The reversal of 729451453 is 354154927.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 224910009 + 504541444 = 14997^2 + 22462^2 .

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 729451453 - 2¹ = 729451451 is a prime.

It is a super-2 number, since 2×729451453² = 1064198844567622418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729451451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29625 + ... + 48337.

It is an arithmetic number, because the mean of its divisors is an integer number (96592311).

Almost surely, 2^729451453 is an apocalyptic number.

It is an amenable number.

729451453 is a deficient number, since it is larger than the sum of its proper divisors (43287035).

729451453 is a wasteful number, since it uses less digits than its factorization.

729451453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21023.

The product of its digits is 151200, while the sum is 40.

The square root of 729451453 is about 27008.3589468150. The cubic root of 729451453 is about 900.1857447903.

The spelling of 729451453 in words is "seven hundred twenty-nine million, four hundred fifty-one thousand, four hundred fifty-three".