729687139 has 2 divisors, whose sum is σ = 729687140. Its totient is φ = 729687138.

The previous prime is 729687137. The next prime is 729687169. The reversal of 729687139 is 931786927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 729687139 - 2¹ = 729687137 is a prime.

Together with 729687137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (729687137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364843569 + 364843570.

It is an arithmetic number, because the mean of its divisors is an integer number (364843570).

Almost surely, 2^729687139 is an apocalyptic number.

729687139 is a deficient number, since it is larger than the sum of its proper divisors (1).

729687139 is an equidigital number, since it uses as much as digits as its factorization.

729687139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The square root of 729687139 is about 27012.7217991820. The cubic root of 729687139 is about 900.2826844523.

The spelling of 729687139 in words is "seven hundred twenty-nine million, six hundred eighty-seven thousand, one hundred thirty-nine".