997806963122 has 18 divisors (see below), whose sum is σ = 1525597565373. Its totient is φ = 489453479112.

The previous prime is 997806963119. The next prime is 997806963149. The reversal of 997806963122 is 221369608799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 946477982641 + 51328980481 = 972871^2 + 226559^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=706331.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74864423 + ... + 74877749.

Almost surely, 2^997806963122 is an apocalyptic number.

997806963122 is a deficient number, since it is larger than the sum of its proper divisors (527790602251).

997806963122 is an frugal number, since it uses more digits than its factorization.

997806963122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26762 (or 13382 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 997806963122 in words is "nine hundred ninety-seven billion, eight hundred six million, nine hundred sixty-three thousand, one hundred twenty-two".