157943 has 4 divisors (see below), whose sum is σ = 160680. Its totient is φ = 155208.

The previous prime is 157933. The next prime is 157951. The reversal of 157943 is 349751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349751 = 367 ⋅953.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157943 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 (157933) 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 in 3 ways as a sum of consecutive naturals, for example, 1280 + ... + 1397.

It is an arithmetic number, because the mean of its divisors is an integer number (40170).

2¹⁵⁷⁹⁴³ is an apocalyptic number.

157943 is a deficient number, since it is larger than the sum of its proper divisors (2737).

157943 is an equidigital number, since it uses as much as digits as its factorization.

157943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736.

The product of its digits is 3780, while the sum is 29.

The square root of 157943 is about 397.4204322880. The cubic root of 157943 is about 54.0546999450.

The spelling of 157943 in words is "one hundred fifty-seven thousand, nine hundred forty-three".