724401497 has 2 divisors, whose sum is σ = 724401498. Its totient is φ = 724401496.

The previous prime is 724401473. The next prime is 724401499. The reversal of 724401497 is 794104427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364199056 + 360202441 = 19084^2 + 18979^2 .

It is a cyclic number.

It is not a de Polignac number, because 724401497 - 2⁸ = 724401241 is a prime.

Together with 724401499, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 724401497.

It is not a weakly prime, because it can be changed into another prime (724401499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362200748 + 362200749.

It is an arithmetic number, because the mean of its divisors is an integer number (362200749).

Almost surely, 2^724401497 is an apocalyptic number.

It is an amenable number.

724401497 is a deficient number, since it is larger than the sum of its proper divisors (1).

724401497 is an equidigital number, since it uses as much as digits as its factorization.

724401497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 724401497 is about 26914.7078193318. The cubic root of 724401497 is about 898.1036188948.

It can be divided in two parts, 72440 and 1497, that added together give a palindrome (73937).

The spelling of 724401497 in words is "seven hundred twenty-four million, four hundred one thousand, four hundred ninety-seven".