1969971 has 4 divisors (see below), whose sum is σ = 2626632. Its totient is φ = 1313312.

The previous prime is 1969969. The next prime is 1969987. The reversal of 1969971 is 1799691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1969971 - 2¹ = 1969969 is a prime.

It is a D-number.

1969971 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1969921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328326 + ... + 328331.

It is an arithmetic number, because the mean of its divisors is an integer number (656658).

2^1969971 is an apocalyptic number.

1969971 is a deficient number, since it is larger than the sum of its proper divisors (656661).

1969971 is an equidigital number, since it uses as much as digits as its factorization.

1969971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656660.

The product of its digits is 30618, while the sum is 42.

The square root of 1969971 is about 1403.5565539016. The cubic root of 1969971 is about 125.3583530165.

The spelling of 1969971 in words is "one million, nine hundred sixty-nine thousand, nine hundred seventy-one".