131035643 has 4 divisors (see below), whose sum is σ = 138743640. Its totient is φ = 123327648.

The previous prime is 131035633. The next prime is 131035661. The reversal of 131035643 is 346530131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346530131 = 709 ⋅488759.

It is a cyclic number.

It is not a de Polignac number, because 131035643 - 2¹⁰ = 131034619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131035633) 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, 3853973 + ... + 3854006.

It is an arithmetic number, because the mean of its divisors is an integer number (34685910).

Almost surely, 2^131035643 is an apocalyptic number.

131035643 is a deficient number, since it is larger than the sum of its proper divisors (7707997).

131035643 is an equidigital number, since it uses as much as digits as its factorization.

131035643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707996.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 131035643 is about 11447.0801080450. The cubic root of 131035643 is about 507.9213652129.

Adding to 131035643 its reverse (346530131), we get a palindrome (477565774).

The spelling of 131035643 in words is "one hundred thirty-one million, thirty-five thousand, six hundred forty-three".