729979 has 2 divisors, whose sum is σ = 729980. Its totient is φ = 729978.

The previous prime is 729977. The next prime is 729991. The reversal of 729979 is 979927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 729979 - 2¹ = 729977 is a prime.

Together with 729977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (729977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364989 + 364990.

It is an arithmetic number, because the mean of its divisors is an integer number (364990).

2⁷²⁹⁹⁷⁹ is an apocalyptic number.

729979 is a deficient number, since it is larger than the sum of its proper divisors (1).

729979 is an equidigital number, since it uses as much as digits as its factorization.

729979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 43.

The square root of 729979 is about 854.3880851229. The cubic root of 729979 is about 90.0402700445.

The spelling of 729979 in words is "seven hundred twenty-nine thousand, nine hundred seventy-nine".