728719031 has 2 divisors, whose sum is σ = 728719032. Its totient is φ = 728719030.

The previous prime is 728719021. The next prime is 728719049. The reversal of 728719031 is 130917827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728719031 - 2¹⁰ = 728718007 is a prime.

It is a super-2 number, since 2×728719031² = 1062062852283157922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728719021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364359515 + 364359516.

It is an arithmetic number, because the mean of its divisors is an integer number (364359516).

Almost surely, 2^728719031 is an apocalyptic number.

728719031 is a deficient number, since it is larger than the sum of its proper divisors (1).

728719031 is an equidigital number, since it uses as much as digits as its factorization.

728719031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 728719031 is about 26994.7963689301. The cubic root of 728719031 is about 899.8843600393.

The spelling of 728719031 in words is "seven hundred twenty-eight million, seven hundred nineteen thousand, thirty-one".