1997377 has 4 divisors (see below), whose sum is σ = 2000320. Its totient is φ = 1994436.

The previous prime is 1997351. The next prime is 1997407. The reversal of 1997377 is 7737991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1907377) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 124 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (500080).

2^1997377 is an apocalyptic number.

It is an amenable number.

1997377 is a deficient number, since it is larger than the sum of its proper divisors (2943).

1997377 is a wasteful number, since it uses less digits than its factorization.

1997377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942.

The product of its digits is 83349, while the sum is 43.

The square root of 1997377 is about 1413.2858875684. The cubic root of 1997377 is about 125.9370013444.

The spelling of 1997377 in words is "one million, nine hundred ninety-seven thousand, three hundred seventy-seven".