997554 has 8 divisors (see below), whose sum is σ = 1995120. Its totient is φ = 332516.

The previous prime is 997553. The next prime is 997573. The reversal of 997554 is 455799.

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

997554 is an admirable number.

It is a super-2 number, since 2×997554² = 1990227965832, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (997553) 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, 83124 + ... + 83135.

It is an arithmetic number, because the mean of its divisors is an integer number (249390).

2⁹⁹⁷⁵⁵⁴ is an apocalyptic number.

997554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

997554 is a wasteful number, since it uses less digits than its factorization.

997554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166264.

The product of its digits is 56700, while the sum is 39.

The square root of 997554 is about 998.7762512195. The cubic root of 997554 is about 99.9184000993.

It can be divided in two parts, 997 and 554, that added together give a palindrome (1551).

The spelling of 997554 in words is "nine hundred ninety-seven thousand, five hundred fifty-four".