1997995 has 8 divisors (see below), whose sum is σ = 2453616. Its totient is φ = 1561056.

The previous prime is 1997969. The next prime is 1997999. The reversal of 1997995 is 5997991.

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 1997995 - 2⁷ = 1997867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997999) 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, 4432 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (306702).

2^1997995 is an apocalyptic number.

1997995 is a deficient number, since it is larger than the sum of its proper divisors (455621).

1997995 is an equidigital number, since it uses as much as digits as its factorization.

1997995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341.

The product of its digits is 229635, while the sum is 49.

The square root of 1997995 is about 1413.5045100742. The cubic root of 1997995 is about 125.9499885507.

It can be divided in two parts, 1997 and 995, that added together give a palindrome (2992).

The spelling of 1997995 in words is "one million, nine hundred ninety-seven thousand, nine hundred ninety-five".