1947897 has 24 divisors (see below), whose sum is σ = 3286400. Its totient is φ = 1111320.

The previous prime is 1947853. The next prime is 1947919. The reversal of 1947897 is 7987491.

It is not a de Polignac number, because 1947897 - 2⁸ = 1947641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1947397) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2772 + ... + 3402.

2^1947897 is an apocalyptic number.

It is an amenable number.

1947897 is a deficient number, since it is larger than the sum of its proper divisors (1338503).

1947897 is an equidigital number, since it uses as much as digits as its factorization.

1947897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 641 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1947897 is about 1395.6708064583. The cubic root of 1947897 is about 124.8883696724. Note that the first 3 decimals are identical.

The spelling of 1947897 in words is "one million, nine hundred forty-seven thousand, eight hundred ninety-seven".