131657243 has 2 divisors, whose sum is σ = 131657244. Its totient is φ = 131657242.

The previous prime is 131657233. The next prime is 131657249. The reversal of 131657243 is 342756131.

It is a strong prime.

It is an emirp because it is prime and its reverse (342756131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131657243 - 2²² = 127462939 is a prime.

It is a super-3 number, since 3×131657243³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (131657249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65828621 + 65828622.

It is an arithmetic number, because the mean of its divisors is an integer number (65828622).

Almost surely, 2^131657243 is an apocalyptic number.

131657243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131657243 is an equidigital number, since it uses as much as digits as its factorization.

131657243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 131657243 is about 11474.1990134388. The cubic root of 131657243 is about 508.7232487991.

The spelling of 131657243 in words is "one hundred thirty-one million, six hundred fifty-seven thousand, two hundred forty-three".