997836632231 has 2 divisors, whose sum is σ = 997836632232. Its totient is φ = 997836632230.

The previous prime is 997836632171. The next prime is 997836632239. The reversal of 997836632231 is 132236638799.

It is a happy number.

997836632231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 997836632231 - 2¹⁸ = 997836370087 is a prime.

It is a super-2 number, since 2×997836632231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997836632239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498918316115 + 498918316116.

It is an arithmetic number, because the mean of its divisors is an integer number (498918316116).

Almost surely, 2^997836632231 is an apocalyptic number.

997836632231 is a deficient number, since it is larger than the sum of its proper divisors (1).

997836632231 is an equidigital number, since it uses as much as digits as its factorization.

997836632231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17635968, while the sum is 59.

The spelling of 997836632231 in words is "nine hundred ninety-seven billion, eight hundred thirty-six million, six hundred thirty-two thousand, two hundred thirty-one".