728232397 has 2 divisors, whose sum is σ = 728232398. Its totient is φ = 728232396.

The previous prime is 728232359. The next prime is 728232403. The reversal of 728232397 is 793232827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725817481 + 2414916 = 26941^2 + 1554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728232397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728232317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364116198 + 364116199.

It is an arithmetic number, because the mean of its divisors is an integer number (364116199).

Almost surely, 2^728232397 is an apocalyptic number.

It is an amenable number.

728232397 is a deficient number, since it is larger than the sum of its proper divisors (1).

728232397 is an equidigital number, since it uses as much as digits as its factorization.

728232397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 728232397 is about 26985.7813857594. The cubic root of 728232397 is about 899.6840030558.

The spelling of 728232397 in words is "seven hundred twenty-eight million, two hundred thirty-two thousand, three hundred ninety-seven".