131630549 has 4 divisors (see below), whose sum is σ = 131667264. Its totient is φ = 131593836.

The previous prime is 131630533. The next prime is 131630563. The reversal of 131630549 is 945036131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 945036131 = 13 ⋅72695087.

It is a cyclic number.

It is not a de Polignac number, because 131630549 - 2⁴ = 131630533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131630579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12317 + ... + 20370.

It is an arithmetic number, because the mean of its divisors is an integer number (32916816).

Almost surely, 2^131630549 is an apocalyptic number.

It is an amenable number.

131630549 is a deficient number, since it is larger than the sum of its proper divisors (36715).

131630549 is an equidigital number, since it uses as much as digits as its factorization.

131630549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36714.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 131630549 is about 11473.0357360203. The cubic root of 131630549 is about 508.6888646261.

The spelling of 131630549 in words is "one hundred thirty-one million, six hundred thirty thousand, five hundred forty-nine".