1965997 has 8 divisors (see below), whose sum is σ = 2219040. Its totient is φ = 1725360.

The previous prime is 1965983. The next prime is 1966007. The reversal of 1965997 is 7995691.

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 1965997 - 2¹⁵ = 1933229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2763 + ... + 3400.

It is an arithmetic number, because the mean of its divisors is an integer number (277380).

2^1965997 is an apocalyptic number.

It is an amenable number.

1965997 is a deficient number, since it is larger than the sum of its proper divisors (253043).

1965997 is a wasteful number, since it uses less digits than its factorization.

1965997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6203.

The product of its digits is 153090, while the sum is 46.

The square root of 1965997 is about 1402.1401499137. The cubic root of 1965997 is about 125.2740016127.

The spelling of 1965997 in words is "one million, nine hundred sixty-five thousand, nine hundred ninety-seven".