1947397 has 2 divisors, whose sum is σ = 1947398. Its totient is φ = 1947396.

The previous prime is 1947391. The next prime is 1947419. The reversal of 1947397 is 7937491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1437601 + 509796 = 1199^2 + 714^2 .

It is an emirp because it is prime and its reverse (7937491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1947397 - 2⁷ = 1947269 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1947391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973698 + 973699.

It is an arithmetic number, because the mean of its divisors is an integer number (973699).

2^1947397 is an apocalyptic number.

It is an amenable number.

1947397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1947397 is an equidigital number, since it uses as much as digits as its factorization.

1947397 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 1947397 is about 1395.4916696276. The cubic root of 1947397 is about 124.8776830141.

It can be divided in two parts, 19473 and 97, that multiplied together give a palindrome (1888881).

The spelling of 1947397 in words is "one million, nine hundred forty-seven thousand, three hundred ninety-seven".