131603777 has 2 divisors, whose sum is σ = 131603778. Its totient is φ = 131603776.

The previous prime is 131603767. The next prime is 131603819. The reversal of 131603777 is 777306131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131079601 + 524176 = 11449^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 131603777 - 2⁴ = 131603761 is a prime.

It is not a weakly prime, because it can be changed into another prime (131603737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65801888 + 65801889.

It is an arithmetic number, because the mean of its divisors is an integer number (65801889).

Almost surely, 2^131603777 is an apocalyptic number.

It is an amenable number.

131603777 is a deficient number, since it is larger than the sum of its proper divisors (1).

131603777 is an equidigital number, since it uses as much as digits as its factorization.

131603777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 131603777 is about 11471.8689410226. The cubic root of 131603777 is about 508.6543753129.

The spelling of 131603777 in words is "one hundred thirty-one million, six hundred three thousand, seven hundred seventy-seven".