997626 has 16 divisors (see below), whose sum is σ = 2280384. Its totient is φ = 285024.

The previous prime is 997609. The next prime is 997627. The reversal of 997626 is 626799.

It is not an unprimeable number, because it can be changed into a prime (997627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11835 + ... + 11918.

It is an arithmetic number, because the mean of its divisors is an integer number (142524).

2⁹⁹⁷⁶²⁶ is an apocalyptic number.

997626 is an abundant number, since it is smaller than the sum of its proper divisors (1282758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997626 is a wasteful number, since it uses less digits than its factorization.

997626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23765.

The product of its digits is 40824, while the sum is 39.

The square root of 997626 is about 998.8122946780. The cubic root of 997626 is about 99.9208039631.

The spelling of 997626 in words is "nine hundred ninety-seven thousand, six hundred twenty-six".