1997107 has 4 divisors (see below), whose sum is σ = 2282416. Its totient is φ = 1711800.

The previous prime is 1997101. The next prime is 1997111. The reversal of 1997107 is 7017991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1997107 - 2⁷ = 1996979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1997101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142644 + ... + 142657.

It is an arithmetic number, because the mean of its divisors is an integer number (570604).

2^1997107 is an apocalyptic number.

1997107 is a deficient number, since it is larger than the sum of its proper divisors (285309).

1997107 is an equidigital number, since it uses as much as digits as its factorization.

1997107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285308.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 1997107 is about 1413.1903622655. The cubic root of 1997107 is about 125.9313264814.

The spelling of 1997107 in words is "one million, nine hundred ninety-seven thousand, one hundred seven".