729632251 has 4 divisors (see below), whose sum is σ = 736451352. Its totient is φ = 722813152.

The previous prime is 729632209. The next prime is 729632261. The reversal of 729632251 is 152236927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 729632251 - 2⁹ = 729631739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 729632251.

It is not an unprimeable number, because it can be changed into a prime (729632201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3409390 + ... + 3409603.

It is an arithmetic number, because the mean of its divisors is an integer number (184112838).

Almost surely, 2^729632251 is an apocalyptic number.

729632251 is a deficient number, since it is larger than the sum of its proper divisors (6819101).

729632251 is a wasteful number, since it uses less digits than its factorization.

729632251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819100.

The product of its digits is 45360, while the sum is 37.

The square root of 729632251 is about 27011.7058143317. The cubic root of 729632251 is about 900.2601104145.

The spelling of 729632251 in words is "seven hundred twenty-nine million, six hundred thirty-two thousand, two hundred fifty-one".