728031751 has 2 divisors, whose sum is σ = 728031752. Its totient is φ = 728031750.

The previous prime is 728031743. The next prime is 728031757. The reversal of 728031751 is 157130827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728031751 - 2³ = 728031743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728031757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364015875 + 364015876.

It is an arithmetic number, because the mean of its divisors is an integer number (364015876).

Almost surely, 2^728031751 is an apocalyptic number.

728031751 is a deficient number, since it is larger than the sum of its proper divisors (1).

728031751 is an equidigital number, since it uses as much as digits as its factorization.

728031751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 728031751 is about 26982.0635052251. The cubic root of 728031751 is about 899.6013670828.

The spelling of 728031751 in words is "seven hundred twenty-eight million, thirty-one thousand, seven hundred fifty-one".