1522347997 has 2 divisors, whose sum is σ = 1522347998. Its totient is φ = 1522347996.

The previous prime is 1522347971. The next prime is 1522348007. The reversal of 1522347997 is 7997432251.

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., 1502802756 + 19545241 = 38766^2 + 4421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1522347997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1522347997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522347797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761173998 + 761173999.

It is an arithmetic number, because the mean of its divisors is an integer number (761173999).

Almost surely, 2^1522347997 is an apocalyptic number.

It is an amenable number.

1522347997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522347997 is an equidigital number, since it uses as much as digits as its factorization.

1522347997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 1522347997 is about 39017.2781854398. The cubic root of 1522347997 is about 1150.3711459896.

The spelling of 1522347997 in words is "one billion, five hundred twenty-two million, three hundred forty-seven thousand, nine hundred ninety-seven".