997286445 has 32 divisors (see below), whose sum is σ = 1782282240. Its totient is φ = 529087680.

The previous prime is 997286429. The next prime is 997286449. The reversal of 997286445 is 544682799.

It is not a de Polignac number, because 997286445 - 2⁴ = 997286429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997286391 and 997286400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997286449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6447 + ... + 45123.

It is an arithmetic number, because the mean of its divisors is an integer number (55696320).

Almost surely, 2^997286445 is an apocalyptic number.

997286445 is the 25785-th pentagonal number.

It is an amenable number.

997286445 is a deficient number, since it is larger than the sum of its proper divisors (784995795).

997286445 is a wasteful number, since it uses less digits than its factorization.

997286445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882 (or 38876 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 997286445 is about 31579.8423840272. The cubic root of 997286445 is about 999.0946622776.

The spelling of 997286445 in words is "nine hundred ninety-seven million, two hundred eighty-six thousand, four hundred forty-five".