1997877 has 12 divisors (see below), whose sum is σ = 3098976. Its totient is φ = 1141560.

The previous prime is 1997867. The next prime is 1997887. The reversal of 1997877 is 7787991.

It is an interprime number because it is at equal distance from previous prime (1997867) and next prime (1997887).

It is not a de Polignac number, because 1997877 - 2⁶ = 1997813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997867) 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 11 ways as a sum of consecutive naturals, for example, 6649 + ... + 6942.

It is an arithmetic number, because the mean of its divisors is an integer number (258248).

2^1997877 is an apocalyptic number.

It is an amenable number.

1997877 is a deficient number, since it is larger than the sum of its proper divisors (1101099).

1997877 is a wasteful number, since it uses less digits than its factorization.

1997877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608 (or 13601 counting only the distinct ones).

The product of its digits is 222264, while the sum is 48.

The square root of 1997877 is about 1413.4627692302. The cubic root of 1997877 is about 125.9475089997.

The spelling of 1997877 in words is "one million, nine hundred ninety-seven thousand, eight hundred seventy-seven".