131788429 has 2 divisors, whose sum is σ = 131788430. Its totient is φ = 131788428.

The previous prime is 131788399. The next prime is 131788457. The reversal of 131788429 is 924887131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131560900 + 227529 = 11470^2 + 477^2 .

It is a cyclic number.

It is not a de Polignac number, because 131788429 - 2⁹ = 131787917 is a prime.

It is equal to p_7473949 and since 131788429 and 7473949 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131788529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65894214 + 65894215.

It is an arithmetic number, because the mean of its divisors is an integer number (65894215).

Almost surely, 2^131788429 is an apocalyptic number.

It is an amenable number.

131788429 is a deficient number, since it is larger than the sum of its proper divisors (1).

131788429 is an equidigital number, since it uses as much as digits as its factorization.

131788429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 131788429 is about 11479.9141547313. The cubic root of 131788429 is about 508.8921601650.

The spelling of 131788429 in words is "one hundred thirty-one million, seven hundred eighty-eight thousand, four hundred twenty-nine".