729776231 has 2 divisors, whose sum is σ = 729776232. Its totient is φ = 729776230.

The previous prime is 729776219. The next prime is 729776309. The reversal of 729776231 is 132677927.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-729776231 is a prime.

It is a super-2 number, since 2×729776231² = 1065146694665130722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729772231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364888115 + 364888116.

It is an arithmetic number, because the mean of its divisors is an integer number (364888116).

Almost surely, 2^729776231 is an apocalyptic number.

729776231 is a deficient number, since it is larger than the sum of its proper divisors (1).

729776231 is an equidigital number, since it uses as much as digits as its factorization.

729776231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 44.

The square root of 729776231 is about 27014.3708236931. The cubic root of 729776231 is about 900.3193233150.

The spelling of 729776231 in words is "seven hundred twenty-nine million, seven hundred seventy-six thousand, two hundred thirty-one".