997039645 has 16 divisors (see below), whose sum is σ = 1384680960. Its totient is φ = 675028224.

The previous prime is 997039607. The next prime is 997039651. The reversal of 997039645 is 546930799.

It is a cyclic number.

It is not a de Polignac number, because 997039645 - 2⁹ = 997039133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 997039592 and 997039601.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 177532 + ... + 183061.

It is an arithmetic number, because the mean of its divisors is an integer number (86542560).

Almost surely, 2^997039645 is an apocalyptic number.

It is an amenable number.

997039645 is a deficient number, since it is larger than the sum of its proper divisors (387641315).

997039645 is a wasteful number, since it uses less digits than its factorization.

997039645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360684.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The square root of 997039645 is about 31575.9345863270. The cubic root of 997039645 is about 999.0122396507.

The spelling of 997039645 in words is "nine hundred ninety-seven million, thirty-nine thousand, six hundred forty-five".