997888343 has 2 divisors, whose sum is σ = 997888344. Its totient is φ = 997888342.

The previous prime is 997888279. The next prime is 997888363. The reversal of 997888343 is 343888799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997888343 - 2⁶ = 997888279 is a prime.

It is a super-2 number, since 2×997888343² = 1991562290190571298, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997888363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498944171 + 498944172.

It is an arithmetic number, because the mean of its divisors is an integer number (498944172).

Almost surely, 2^997888343 is an apocalyptic number.

997888343 is a deficient number, since it is larger than the sum of its proper divisors (1).

997888343 is an equidigital number, since it uses as much as digits as its factorization.

997888343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The square root of 997888343 is about 31589.3707281421. The cubic root of 997888343 is about 999.2956182962.

The spelling of 997888343 in words is "nine hundred ninety-seven million, eight hundred eighty-eight thousand, three hundred forty-three".