1997475763 has 2 divisors, whose sum is σ = 1997475764. Its totient is φ = 1997475762.

The previous prime is 1997475749. The next prime is 1997475803. The reversal of 1997475763 is 3675747991.

It is a weak prime.

It is an emirp because it is prime and its reverse (3675747991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997475763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1997475698 and 1997475707.

It is not a weakly prime, because it can be changed into another prime (1997475743) 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, 998737881 + 998737882.

It is an arithmetic number, because the mean of its divisors is an integer number (998737882).

Almost surely, 2^1997475763 is an apocalyptic number.

1997475763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1997475763 is an equidigital number, since it uses as much as digits as its factorization.

1997475763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10001880, while the sum is 58.

The square root of 1997475763 is about 44693.1288119326. The cubic root of 1997475763 is about 1259.3907701851.

The spelling of 1997475763 in words is "one billion, nine hundred ninety-seven million, four hundred seventy-five thousand, seven hundred sixty-three".