997549055 has 8 divisors (see below), whose sum is σ = 1197286272. Its totient is φ = 797887648.

The previous prime is 997549051. The next prime is 997549057. The reversal of 997549055 is 550945799.

It is a happy number.

It is a Cunningham number, because it is equal to 31584²-1.

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

It is a cyclic number.

It is not a de Polignac number, because 997549055 - 2² = 997549051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997548988 and 997549006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997549051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15794 + ... + 47376.

It is an arithmetic number, because the mean of its divisors is an integer number (149660784).

Almost surely, 2^997549055 is an apocalyptic number.

997549055 is a deficient number, since it is larger than the sum of its proper divisors (199737217).

997549055 is a wasteful number, since it uses less digits than its factorization.

997549055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37905.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The square root of 997549055 is about 31583.9999841692. Note that the first 4 decimals coincide. The cubic root of 997549055 is about 999.1823499640.

The spelling of 997549055 in words is "nine hundred ninety-seven million, five hundred forty-nine thousand, fifty-five".