997464847 has 2 divisors, whose sum is σ = 997464848. Its totient is φ = 997464846.

The previous prime is 997464799. The next prime is 997464877. The reversal of 997464847 is 748464799.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997464847 is a prime.

It is a super-2 number, since 2×997464847² = 1989872242001466818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 997464791 and 997464800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997464877) 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, 498732423 + 498732424.

It is an arithmetic number, because the mean of its divisors is an integer number (498732424).

Almost surely, 2^997464847 is an apocalyptic number.

997464847 is a deficient number, since it is larger than the sum of its proper divisors (1).

997464847 is an equidigital number, since it uses as much as digits as its factorization.

997464847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 58.

The square root of 997464847 is about 31582.6668759939. Note that the first 3 decimals coincide. The cubic root of 997464847 is about 999.1542338813.

The spelling of 997464847 in words is "nine hundred ninety-seven million, four hundred sixty-four thousand, eight hundred forty-seven".