1965998 has 8 divisors (see below), whose sum is σ = 2999160. Its totient is φ = 966280.

The previous prime is 1965983. The next prime is 1966007. The reversal of 1965998 is 8995691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8213 + ... + 8448.

It is an arithmetic number, because the mean of its divisors is an integer number (374895).

2^1965998 is an apocalyptic number.

1965998 is a deficient number, since it is larger than the sum of its proper divisors (1033162).

1965998 is a wasteful number, since it uses less digits than its factorization.

1965998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16722.

The product of its digits is 174960, while the sum is 47.

The square root of 1965998 is about 1402.1405065114. The cubic root of 1965998 is about 125.2740228529.

The spelling of 1965998 in words is "one million, nine hundred sixty-five thousand, nine hundred ninety-eight".