997609633 has 4 divisors (see below), whose sum is σ = 1008818820. Its totient is φ = 986400448.

The previous prime is 997609609. The next prime is 997609637. The reversal of 997609633 is 336906799.

997609633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 562970529 + 434639104 = 23727^2 + 20848^2 .

It is a cyclic number.

It is not a de Polignac number, because 997609633 - 2⁵ = 997609601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997609637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5604460 + ... + 5604637.

It is an arithmetic number, because the mean of its divisors is an integer number (252204705).

Almost surely, 2^997609633 is an apocalyptic number.

It is an amenable number.

997609633 is a deficient number, since it is larger than the sum of its proper divisors (11209187).

997609633 is a wasteful number, since it uses less digits than its factorization.

997609633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11209186.

The product of its (nonzero) digits is 1653372, while the sum is 52.

The square root of 997609633 is about 31584.9589678378. The cubic root of 997609633 is about 999.2025752828.

The spelling of 997609633 in words is "nine hundred ninety-seven million, six hundred nine thousand, six hundred thirty-three".