1947971 has 2 divisors, whose sum is σ = 1947972. Its totient is φ = 1947970.

The previous prime is 1947941. The next prime is 1947973. The reversal of 1947971 is 1797491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1947971 - 2¹⁰ = 1946947 is a prime.

Together with 1947973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1947973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973985 + 973986.

It is an arithmetic number, because the mean of its divisors is an integer number (973986).

2^1947971 is an apocalyptic number.

1947971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947971 is an equidigital number, since it uses as much as digits as its factorization.

1947971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 38.

The square root of 1947971 is about 1395.6973167560. The cubic root of 1947971 is about 124.8899511424.

The spelling of 1947971 in words is "one million, nine hundred forty-seven thousand, nine hundred seventy-one".