131378413 has 4 divisors (see below), whose sum is σ = 131402908. Its totient is φ = 131353920.

The previous prime is 131378411. The next prime is 131378437. The reversal of 131378413 is 314873131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18636489 + 112741924 = 4317^2 + 10618^2 .

It is a cyclic number.

It is not a de Polignac number, because 131378413 - 2¹ = 131378411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131378411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (32850727).

Almost surely, 2^131378413 is an apocalyptic number.

It is an amenable number.

131378413 is a deficient number, since it is larger than the sum of its proper divisors (24495).

131378413 is an equidigital number, since it uses as much as digits as its factorization.

131378413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24494.

The product of its digits is 6048, while the sum is 31.

The square root of 131378413 is about 11462.0422700320. The cubic root of 131378413 is about 508.3638621696.

The spelling of 131378413 in words is "one hundred thirty-one million, three hundred seventy-eight thousand, four hundred thirteen".