997844955 has 8 divisors (see below), whose sum is σ = 1596551952. Its totient is φ = 532183968.

The previous prime is 997844951. The next prime is 997844959. The reversal of 997844955 is 559448799.

It is an interprime number because it is at equal distance from previous prime (997844951) and next prime (997844959).

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

It is not a de Polignac number, because 997844955 - 2² = 997844951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997844951) 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, 33261484 + ... + 33261513.

It is an arithmetic number, because the mean of its divisors is an integer number (199568994).

Almost surely, 2^997844955 is an apocalyptic number.

997844955 is a deficient number, since it is larger than the sum of its proper divisors (598706997).

997844955 is a wasteful number, since it uses less digits than its factorization.

997844955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66523005.

The product of its digits is 16329600, while the sum is 60.

The square root of 997844955 is about 31588.6839706880. The cubic root of 997844955 is about 999.2811350236.

The spelling of 997844955 in words is "nine hundred ninety-seven million, eight hundred forty-four thousand, nine hundred fifty-five".