729136831 has 2 divisors, whose sum is σ = 729136832. Its totient is φ = 729136830.

The previous prime is 729136781. The next prime is 729136867. The reversal of 729136831 is 138631927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 729136831 - 2¹⁵ = 729104063 is a prime.

It is a super-2 number, since 2×729136831² = 1063281036641445122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729136931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364568415 + 364568416.

It is an arithmetic number, because the mean of its divisors is an integer number (364568416).

Almost surely, 2^729136831 is an apocalyptic number.

729136831 is a deficient number, since it is larger than the sum of its proper divisors (1).

729136831 is an equidigital number, since it uses as much as digits as its factorization.

729136831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 729136831 is about 27002.5337885170. The cubic root of 729136831 is about 900.0563055309.

The spelling of 729136831 in words is "seven hundred twenty-nine million, one hundred thirty-six thousand, eight hundred thirty-one".