131603287 has 2 divisors, whose sum is σ = 131603288. Its totient is φ = 131603286.

The previous prime is 131603279. The next prime is 131603299. The reversal of 131603287 is 782306131.

It is a weak prime.

It is an emirp because it is prime and its reverse (782306131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131603287 - 2³ = 131603279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131603387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65801643 + 65801644.

It is an arithmetic number, because the mean of its divisors is an integer number (65801644).

Almost surely, 2^131603287 is an apocalyptic number.

131603287 is a deficient number, since it is larger than the sum of its proper divisors (1).

131603287 is an equidigital number, since it uses as much as digits as its factorization.

131603287 is an evil number, because the sum of its binary digits is even.

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

The square root of 131603287 is about 11471.8475844129. The cubic root of 131603287 is about 508.6537440216.

The spelling of 131603287 in words is "one hundred thirty-one million, six hundred three thousand, two hundred eighty-seven".