7563231997 has 2 divisors, whose sum is σ = 7563231998. Its totient is φ = 7563231996.

The previous prime is 7563231989. The next prime is 7563232021. The reversal of 7563231997 is 7991323657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7549176996 + 14055001 = 86886^2 + 3749^2 .

It is an emirp because it is prime and its reverse (7991323657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7563231997 - 2³ = 7563231989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7563231947) 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, 3781615998 + 3781615999.

It is an arithmetic number, because the mean of its divisors is an integer number (3781615999).

Almost surely, 2^7563231997 is an apocalyptic number.

It is an amenable number.

7563231997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7563231997 is an equidigital number, since it uses as much as digits as its factorization.

7563231997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 52.

The square root of 7563231997 is about 86966.8442396296. The cubic root of 7563231997 is about 1962.9194308299.

The spelling of 7563231997 in words is "seven billion, five hundred sixty-three million, two hundred thirty-one thousand, nine hundred ninety-seven".