131406349 has 2 divisors, whose sum is σ = 131406350. Its totient is φ = 131406348.

The previous prime is 131406287. The next prime is 131406397. The reversal of 131406349 is 943604131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91489225 + 39917124 = 9565^2 + 6318^2 .

It is an emirp because it is prime and its reverse (943604131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131406349 - 2⁹ = 131405837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131406349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131406049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65703174 + 65703175.

It is an arithmetic number, because the mean of its divisors is an integer number (65703175).

Almost surely, 2^131406349 is an apocalyptic number.

It is an amenable number.

131406349 is a deficient number, since it is larger than the sum of its proper divisors (1).

131406349 is an equidigital number, since it uses as much as digits as its factorization.

131406349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 131406349 is about 11463.2608362542. The cubic root of 131406349 is about 508.3998920522.

The spelling of 131406349 in words is "one hundred thirty-one million, four hundred six thousand, three hundred forty-nine".