131578841 has 2 divisors, whose sum is σ = 131578842. Its totient is φ = 131578840.

The previous prime is 131578831. The next prime is 131578859. The reversal of 131578841 is 148875131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 19324816 = 10595^2 + 4396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131578841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131578795 and 131578804.

It is not a weakly prime, because it can be changed into another prime (131578801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65789420 + 65789421.

It is an arithmetic number, because the mean of its divisors is an integer number (65789421).

Almost surely, 2^131578841 is an apocalyptic number.

It is an amenable number.

131578841 is a deficient number, since it is larger than the sum of its proper divisors (1).

131578841 is an equidigital number, since it uses as much as digits as its factorization.

131578841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The square root of 131578841 is about 11470.7820570352. The cubic root of 131578841 is about 508.6222470387.

The spelling of 131578841 in words is "one hundred thirty-one million, five hundred seventy-eight thousand, eight hundred forty-one".