131700643 has 4 divisors (see below), whose sum is σ = 131941960. Its totient is φ = 131459328.

The previous prime is 131700637. The next prime is 131700659. The reversal of 131700643 is 346007131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131700643 is a prime.

It is a super-2 number, since 2×131700643² = 34690118733226898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131700623) 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 in 3 ways as a sum of consecutive naturals, for example, 119838 + ... + 120931.

It is an arithmetic number, because the mean of its divisors is an integer number (32985490).

Almost surely, 2^131700643 is an apocalyptic number.

131700643 is a deficient number, since it is larger than the sum of its proper divisors (241317).

131700643 is an equidigital number, since it uses as much as digits as its factorization.

131700643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241316.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 131700643 is about 11476.0900571580. The cubic root of 131700643 is about 508.7791418208.

Adding to 131700643 its reverse (346007131), we get a palindrome (477707774).

The spelling of 131700643 in words is "one hundred thirty-one million, seven hundred thousand, six hundred forty-three".