997249763 has 2 divisors, whose sum is σ = 997249764. Its totient is φ = 997249762.

The previous prime is 997249711. The next prime is 997249783. The reversal of 997249763 is 367942799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997249763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997249699 and 997249708.

It is not a weakly prime, because it can be changed into another prime (997249783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498624881 + 498624882.

It is an arithmetic number, because the mean of its divisors is an integer number (498624882).

Almost surely, 2^997249763 is an apocalyptic number.

997249763 is a deficient number, since it is larger than the sum of its proper divisors (1).

997249763 is an equidigital number, since it uses as much as digits as its factorization.

997249763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The square root of 997249763 is about 31579.2615968138. The cubic root of 997249763 is about 999.0824126243.

The spelling of 997249763 in words is "nine hundred ninety-seven million, two hundred forty-nine thousand, seven hundred sixty-three".