997671229 has 2 divisors, whose sum is σ = 997671230. Its totient is φ = 997671228.

The previous prime is 997671211. The next prime is 997671239. The reversal of 997671229 is 922176799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 581919129 + 415752100 = 24123^2 + 20390^2 .

It is a cyclic number.

It is not a de Polignac number, because 997671229 - 2¹¹ = 997669181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997671239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498835614 + 498835615.

It is an arithmetic number, because the mean of its divisors is an integer number (498835615).

Almost surely, 2^997671229 is an apocalyptic number.

It is an amenable number.

997671229 is a deficient number, since it is larger than the sum of its proper divisors (1).

997671229 is an equidigital number, since it uses as much as digits as its factorization.

997671229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 997671229 is about 31585.9340371628. The cubic root of 997671229 is about 999.2231396443.

The spelling of 997671229 in words is "nine hundred ninety-seven million, six hundred seventy-one thousand, two hundred twenty-nine".