1957897 has 4 divisors (see below), whose sum is σ = 1961680. Its totient is φ = 1954116.

The previous prime is 1957871. The next prime is 1957903. The reversal of 1957897 is 7987591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1957897 - 2¹⁵ = 1925129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1957847) 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, 963 + ... + 2200.

It is an arithmetic number, because the mean of its divisors is an integer number (490420).

2^1957897 is an apocalyptic number.

It is an amenable number.

1957897 is a deficient number, since it is larger than the sum of its proper divisors (3783).

1957897 is an equidigital number, since it uses as much as digits as its factorization.

1957897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782.

The product of its digits is 158760, while the sum is 46.

The square root of 1957897 is about 1399.2487269960. The cubic root of 1957897 is about 125.1017198688.

The spelling of 1957897 in words is "one million, nine hundred fifty-seven thousand, eight hundred ninety-seven".