1957994 has 4 divisors (see below), whose sum is σ = 2936994. Its totient is φ = 978996.

The previous prime is 1957981. The next prime is 1957997. The reversal of 1957994 is 4997591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4997591 = 181 ⋅27611.

It can be written as a sum of positive squares in only one way, i.e., 1923769 + 34225 = 1387^2 + 185^2 .

It is not an unprimeable number, because it can be changed into a prime (1957997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489497 + ... + 489500.

2^1957994 is an apocalyptic number.

1957994 is a deficient number, since it is larger than the sum of its proper divisors (979000).

1957994 is an equidigital number, since it uses as much as digits as its factorization.

1957994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978999.

The product of its digits is 102060, while the sum is 44.

The square root of 1957994 is about 1399.2833880240. The cubic root of 1957994 is about 125.1037858042.

The spelling of 1957994 in words is "one million, nine hundred fifty-seven thousand, nine hundred ninety-four".