131813387 has 2 divisors, whose sum is σ = 131813388. Its totient is φ = 131813386.

The previous prime is 131813347. The next prime is 131813411. The reversal of 131813387 is 783318131.

It is a strong prime.

It is an emirp because it is prime and its reverse (783318131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131813387 - 2¹⁰ = 131812363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131813327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65906693 + 65906694.

It is an arithmetic number, because the mean of its divisors is an integer number (65906694).

Almost surely, 2^131813387 is an apocalyptic number.

131813387 is a deficient number, since it is larger than the sum of its proper divisors (1).

131813387 is an equidigital number, since it uses as much as digits as its factorization.

131813387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 131813387 is about 11481.0011323055. The cubic root of 131813387 is about 508.9242826838.

The spelling of 131813387 in words is "one hundred thirty-one million, eight hundred thirteen thousand, three hundred eighty-seven".