1971968 has 18 divisors (see below), whose sum is σ = 3936744. Its totient is φ = 985856.

The previous prime is 1971967. The next prime is 1972007. The reversal of 1971968 is 8691791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3596 + ... + 4107.

It is an arithmetic number, because the mean of its divisors is an integer number (218708).

2^1971968 is an apocalyptic number.

It is an amenable number.

1971968 is a deficient number, since it is larger than the sum of its proper divisors (1964776).

1971968 is an frugal number, since it uses more digits than its factorization.

1971968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719 (or 7705 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 1971968 is about 1404.2677807313. The cubic root of 1971968 is about 125.4006981554.

The spelling of 1971968 in words is "one million, nine hundred seventy-one thousand, nine hundred sixty-eight".