997612226 has 16 divisors (see below), whose sum is σ = 1621798584. Its totient is φ = 457501824.

The previous prime is 997612223. The next prime is 997612229. The reversal of 997612226 is 622216799.

It is a Cunningham number, because it is equal to 31585²+1.

It is an interprime number because it is at equal distance from previous prime (997612223) and next prime (997612229).

It can be written as a sum of positive squares in 4 ways, for example, as 675948001 + 321664225 = 25999^2 + 17935^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (997612223) 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 in 7 ways as a sum of consecutive naturals, for example, 118115 + ... + 126278.

Almost surely, 2^997612226 is an apocalyptic number.

997612226 is a deficient number, since it is larger than the sum of its proper divisors (624186358).

997612226 is a wasteful number, since it uses less digits than its factorization.

997612226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244565.

The product of its digits is 163296, while the sum is 44.

The square root of 997612226 is about 31585.0000158303. Note that the first 4 decimals coincide. The cubic root of 997612226 is about 999.2034409956.

The spelling of 997612226 in words is "nine hundred ninety-seven million, six hundred twelve thousand, two hundred twenty-six".