997654 has 8 divisors (see below), whose sum is σ = 1710288. Its totient is φ = 427560.

The previous prime is 997651. The next prime is 997663. The reversal of 997654 is 456799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35617 + ... + 35644.

It is an arithmetic number, because the mean of its divisors is an integer number (213786).

2⁹⁹⁷⁶⁵⁴ is an apocalyptic number.

997654 is a deficient number, since it is larger than the sum of its proper divisors (712634).

997654 is a wasteful number, since it uses less digits than its factorization.

997654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71270.

The product of its digits is 68040, while the sum is 40.

The square root of 997654 is about 998.8263112273. The cubic root of 997654 is about 99.9217387678.

The spelling of 997654 in words is "nine hundred ninety-seven thousand, six hundred fifty-four".