131447643 has 16 divisors (see below), whose sum is σ = 189477120. Its totient is φ = 80774496.

The previous prime is 131447639. The next prime is 131447647. The reversal of 131447643 is 346744131.

It is an interprime number because it is at equal distance from previous prime (131447639) and next prime (131447647).

It is not a de Polignac number, because 131447643 - 2² = 131447639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131447647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29055 + ... + 33272.

It is an arithmetic number, because the mean of its divisors is an integer number (11842320).

Almost surely, 2^131447643 is an apocalyptic number.

131447643 is a deficient number, since it is larger than the sum of its proper divisors (58029477).

131447643 is a wasteful number, since it uses less digits than its factorization.

131447643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62386.

The product of its digits is 24192, while the sum is 33.

The square root of 131447643 is about 11465.0618402170. The cubic root of 131447643 is about 508.4531407894.

The spelling of 131447643 in words is "one hundred thirty-one million, four hundred forty-seven thousand, six hundred forty-three".