131906629 has 2 divisors, whose sum is σ = 131906630. Its totient is φ = 131906628.

The previous prime is 131906627. The next prime is 131906639. The reversal of 131906629 is 926609131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77176225 + 54730404 = 8785^2 + 7398^2 .

It is a cyclic number.

It is not a de Polignac number, because 131906629 - 2¹ = 131906627 is a prime.

Together with 131906627, 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 (131906623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65953314 + 65953315.

It is an arithmetic number, because the mean of its divisors is an integer number (65953315).

Almost surely, 2^131906629 is an apocalyptic number.

It is an amenable number.

131906629 is a deficient number, since it is larger than the sum of its proper divisors (1).

131906629 is an equidigital number, since it uses as much as digits as its factorization.

131906629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 131906629 is about 11485.0611230415. The cubic root of 131906629 is about 509.0442551548.

The spelling of 131906629 in words is "one hundred thirty-one million, nine hundred six thousand, six hundred twenty-nine".