728481497 has 2 divisors, whose sum is σ = 728481498. Its totient is φ = 728481496.

The previous prime is 728481463. The next prime is 728481517. The reversal of 728481497 is 794184827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646379776 + 82101721 = 25424^2 + 9061^2 .

It is an emirp because it is prime and its reverse (794184827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728481497 - 2²⁰ = 727432921 is a prime.

It is a super-2 number, since 2×728481497² = 1061370582942722018, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728481097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364240748 + 364240749.

It is an arithmetic number, because the mean of its divisors is an integer number (364240749).

Almost surely, 2^728481497 is an apocalyptic number.

It is an amenable number.

728481497 is a deficient number, since it is larger than the sum of its proper divisors (1).

728481497 is an equidigital number, since it uses as much as digits as its factorization.

728481497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 50.

The square root of 728481497 is about 26990.3963846402. The cubic root of 728481497 is about 899.7865736718.

The spelling of 728481497 in words is "seven hundred twenty-eight million, four hundred eighty-one thousand, four hundred ninety-seven".