1224319897 has 2 divisors, whose sum is σ = 1224319898. Its totient is φ = 1224319896.

The previous prime is 1224319871. The next prime is 1224319913. The reversal of 1224319897 is 7989134221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947962521 + 276357376 = 30789^2 + 16624^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224319897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224319807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612159948 + 612159949.

It is an arithmetic number, because the mean of its divisors is an integer number (612159949).

Almost surely, 2^1224319897 is an apocalyptic number.

It is an amenable number.

1224319897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224319897 is an equidigital number, since it uses as much as digits as its factorization.

1224319897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 1224319897 is about 34990.2828939693. The cubic root of 1224319897 is about 1069.7894298421.

The spelling of 1224319897 in words is "one billion, two hundred twenty-four million, three hundred nineteen thousand, eight hundred ninety-seven".