1947973 has 2 divisors, whose sum is σ = 1947974. Its totient is φ = 1947972.

The previous prime is 1947971. The next prime is 1947977. The reversal of 1947973 is 3797491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684804 + 263169 = 1298^2 + 513^2 .

It is an emirp because it is prime and its reverse (3797491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1947973 - 2¹ = 1947971 is a prime.

Together with 1947971, it forms a pair of twin primes.

1947973 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1947971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973986 + 973987.

It is an arithmetic number, because the mean of its divisors is an integer number (973987).

2^1947973 is an apocalyptic number.

It is an amenable number.

1947973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947973 is an equidigital number, since it uses as much as digits as its factorization.

1947973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 1947973 is about 1395.6980332436. The cubic root of 1947973 is about 124.8899938843.

It can be divided in two parts, 1947 and 973, that multiplied together give a triangular number (1894431 = T₁₉₄₆).

The spelling of 1947973 in words is "one million, nine hundred forty-seven thousand, nine hundred seventy-three".