1971693 has 24 divisors (see below), whose sum is σ = 3035136. Its totient is φ = 1231200.

The previous prime is 1971691. The next prime is 1971707. The reversal of 1971693 is 3961791.

It is not a de Polignac number, because 1971693 - 2¹ = 1971691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971691) 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 23 ways as a sum of consecutive naturals, for example, 10228 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (126464).

2^1971693 is an apocalyptic number.

It is an amenable number.

1971693 is a deficient number, since it is larger than the sum of its proper divisors (1063443).

1971693 is a wasteful number, since it uses less digits than its factorization.

1971693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 262 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1971693 is about 1404.1698615196. The cubic root of 1971693 is about 125.3948686499.

The spelling of 1971693 in words is "one million, nine hundred seventy-one thousand, six hundred ninety-three".