997955 has 8 divisors (see below), whose sum is σ = 1368672. Its totient is φ = 684288.

The previous prime is 997949. The next prime is 997961. The reversal of 997955 is 559799.

997955 = T₈₂ + T₈₃ + ... + T₁₈₆.

It is an interprime number because it is at equal distance from previous prime (997949) and next prime (997961).

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 997955 - 2⁶ = 997891 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14222 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (171084).

2⁹⁹⁷⁹⁵⁵ is an apocalyptic number.

997955 is a deficient number, since it is larger than the sum of its proper divisors (370717).

997955 is a wasteful number, since it uses less digits than its factorization.

997955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28525.

The product of its digits is 127575, while the sum is 44.

The square root of 997955 is about 998.9769767117. The cubic root of 997955 is about 99.9317868135.

It can be divided in two parts, 9979 and 55, that multiplied together give a palindrome (548845).

The spelling of 997955 in words is "nine hundred ninety-seven thousand, nine hundred fifty-five".