997612229 has 2 divisors, whose sum is σ = 997612230. Its totient is φ = 997612228.

The previous prime is 997612223. The next prime is 997612247. The reversal of 997612229 is 922216799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997612225 + 4 = 31585^2 + 2^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997612229 is a prime.

It is a super-3 number, since 3×997612229³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997612223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498806114 + 498806115.

It is an arithmetic number, because the mean of its divisors is an integer number (498806115).

Almost surely, 2^997612229 is an apocalyptic number.

It is an amenable number.

997612229 is a deficient number, since it is larger than the sum of its proper divisors (1).

997612229 is an equidigital number, since it uses as much as digits as its factorization.

997612229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 997612229 is about 31585.0000633212. Note that the first 4 decimals coincide. The cubic root of 997612229 is about 999.2034419972.

The spelling of 997612229 in words is "nine hundred ninety-seven million, six hundred twelve thousand, two hundred twenty-nine".