131771377 has 2 divisors, whose sum is σ = 131771378. Its totient is φ = 131771376.

The previous prime is 131771371. The next prime is 131771401. The reversal of 131771377 is 773177131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 531441 = 11456^2 + 729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131771377 is a prime.

It is a super-2 number, since 2×131771377² = 34727391592952258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131771371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65885688 + 65885689.

It is an arithmetic number, because the mean of its divisors is an integer number (65885689).

Almost surely, 2^131771377 is an apocalyptic number.

It is an amenable number.

131771377 is a deficient number, since it is larger than the sum of its proper divisors (1).

131771377 is an equidigital number, since it uses as much as digits as its factorization.

131771377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21609, while the sum is 37.

The square root of 131771377 is about 11479.1714422253. The cubic root of 131771377 is about 508.8702108344.

The spelling of 131771377 in words is "one hundred thirty-one million, seven hundred seventy-one thousand, three hundred seventy-seven".