728847929 has 2 divisors, whose sum is σ = 728847930. Its totient is φ = 728847928.

The previous prime is 728847907. The next prime is 728847937. The reversal of 728847929 is 929748827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724847929 + 4000000 = 26923^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 728847929 - 2²⁰ = 727799353 is a prime.

It is not a weakly prime, because it can be changed into another prime (728847829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364423964 + 364423965.

It is an arithmetic number, because the mean of its divisors is an integer number (364423965).

Almost surely, 2^728847929 is an apocalyptic number.

It is an amenable number.

728847929 is a deficient number, since it is larger than the sum of its proper divisors (1).

728847929 is an equidigital number, since it uses as much as digits as its factorization.

728847929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 728847929 is about 26997.1837234923. The cubic root of 728847929 is about 899.9374149896.

The spelling of 728847929 in words is "seven hundred twenty-eight million, eight hundred forty-seven thousand, nine hundred twenty-nine".