1956997 has 4 divisors (see below), whose sum is σ = 2236576. Its totient is φ = 1677420.

The previous prime is 1956991. The next prime is 1957013. The reversal of 1956997 is 7996591.

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 a de Polignac number, because none of the positive numbers 2^k-1956997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1956991) 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, 139779 + ... + 139792.

It is an arithmetic number, because the mean of its divisors is an integer number (559144).

2^1956997 is an apocalyptic number.

It is an amenable number.

1956997 is a deficient number, since it is larger than the sum of its proper divisors (279579).

1956997 is an equidigital number, since it uses as much as digits as its factorization.

1956997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279578.

The product of its digits is 153090, while the sum is 46.

The square root of 1956997 is about 1398.9270888792. The cubic root of 1956997 is about 125.0825481411.

The spelling of 1956997 in words is "one million, nine hundred fifty-six thousand, nine hundred ninety-seven".