131516647 has 2 divisors, whose sum is σ = 131516648. Its totient is φ = 131516646.

The previous prime is 131516639. The next prime is 131516659. The reversal of 131516647 is 746615131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131516647 - 2³ = 131516639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131516677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65758323 + 65758324.

It is an arithmetic number, because the mean of its divisors is an integer number (65758324).

Almost surely, 2^131516647 is an apocalyptic number.

131516647 is a deficient number, since it is larger than the sum of its proper divisors (1).

131516647 is an equidigital number, since it uses as much as digits as its factorization.

131516647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 131516647 is about 11468.0707619024. The cubic root of 131516647 is about 508.5420967725.

The spelling of 131516647 in words is "one hundred thirty-one million, five hundred sixteen thousand, six hundred forty-seven".