997353211 has 2 divisors, whose sum is σ = 997353212. Its totient is φ = 997353210.

The previous prime is 997353199. The next prime is 997353251. The reversal of 997353211 is 112353799.

It is an a-pointer prime, because the next prime (997353251) can be obtained adding 997353211 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 997353211 - 2⁵ = 997353179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997353251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498676605 + 498676606.

It is an arithmetic number, because the mean of its divisors is an integer number (498676606).

Almost surely, 2^997353211 is an apocalyptic number.

997353211 is a deficient number, since it is larger than the sum of its proper divisors (1).

997353211 is an equidigital number, since it uses as much as digits as its factorization.

997353211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 40.

The square root of 997353211 is about 31580.8994647081. The cubic root of 997353211 is about 999.1169574654.

The spelling of 997353211 in words is "nine hundred ninety-seven million, three hundred fifty-three thousand, two hundred eleven".