131238629 has 2 divisors, whose sum is σ = 131238630. Its totient is φ = 131238628.

The previous prime is 131238619. The next prime is 131238631. The reversal of 131238629 is 926832131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104509729 + 26728900 = 10223^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 131238629 - 2¹² = 131234533 is a prime.

Together with 131238631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131238619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65619314 + 65619315.

It is an arithmetic number, because the mean of its divisors is an integer number (65619315).

Almost surely, 2^131238629 is an apocalyptic number.

It is an amenable number.

131238629 is a deficient number, since it is larger than the sum of its proper divisors (1).

131238629 is an equidigital number, since it uses as much as digits as its factorization.

131238629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 131238629 is about 11455.9429555144. The cubic root of 131238629 is about 508.1835018655.

The spelling of 131238629 in words is "one hundred thirty-one million, two hundred thirty-eight thousand, six hundred twenty-nine".