729427631 has 2 divisors, whose sum is σ = 729427632. Its totient is φ = 729427630.

The previous prime is 729427627. The next prime is 729427637. The reversal of 729427631 is 136724927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 729427631 - 2² = 729427627 is a prime.

It is a super-2 number, since 2×729427631² = 1064129337732544322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729427637) 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 as a sum of consecutive naturals, namely, 364713815 + 364713816.

It is an arithmetic number, because the mean of its divisors is an integer number (364713816).

Almost surely, 2^729427631 is an apocalyptic number.

729427631 is a deficient number, since it is larger than the sum of its proper divisors (1).

729427631 is an equidigital number, since it uses as much as digits as its factorization.

729427631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 41.

The square root of 729427631 is about 27007.9179315992. The cubic root of 729427631 is about 900.1759454367.

The spelling of 729427631 in words is "seven hundred twenty-nine million, four hundred twenty-seven thousand, six hundred thirty-one".