997235671 has 4 divisors (see below), whose sum is σ = 1002807000. Its totient is φ = 991664344.

The previous prime is 997235611. The next prime is 997235713. The reversal of 997235671 is 176532799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 997235671 - 2¹⁹ = 996711383 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997235611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785396 + ... + 2785753.

It is an arithmetic number, because the mean of its divisors is an integer number (250701750).

Almost surely, 2^997235671 is an apocalyptic number.

997235671 is a deficient number, since it is larger than the sum of its proper divisors (5571329).

997235671 is a wasteful number, since it uses less digits than its factorization.

997235671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571328.

The product of its digits is 714420, while the sum is 49.

The square root of 997235671 is about 31579.0384749124. The cubic root of 997235671 is about 999.0777066365.

The spelling of 997235671 in words is "nine hundred ninety-seven million, two hundred thirty-five thousand, six hundred seventy-one".