131377387 has 2 divisors, whose sum is σ = 131377388. Its totient is φ = 131377386.

The previous prime is 131377339. The next prime is 131377423. The reversal of 131377387 is 783773131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131377387 is a prime.

It is not a weakly prime, because it can be changed into another prime (131374387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65688693 + 65688694.

It is an arithmetic number, because the mean of its divisors is an integer number (65688694).

Almost surely, 2^131377387 is an apocalyptic number.

131377387 is a deficient number, since it is larger than the sum of its proper divisors (1).

131377387 is an equidigital number, since it uses as much as digits as its factorization.

131377387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 131377387 is about 11461.9975135227. The cubic root of 131377387 is about 508.3625388099.

The spelling of 131377387 in words is "one hundred thirty-one million, three hundred seventy-seven thousand, three hundred eighty-seven".