131447766 has 8 divisors (see below), whose sum is σ = 262895544. Its totient is φ = 43815920.

The previous prime is 131447761. The next prime is 131447777. The reversal of 131447766 is 667744131.

It is a sphenic number, since it is the product of 3 distinct primes.

131447766 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131447761) 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 3 ways as a sum of consecutive naturals, for example, 10953975 + ... + 10953986.

It is an arithmetic number, because the mean of its divisors is an integer number (32861943).

Almost surely, 2^131447766 is an apocalyptic number.

131447766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131447766 is a wasteful number, since it uses less digits than its factorization.

131447766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21907966.

The product of its digits is 84672, while the sum is 39.

The square root of 131447766 is about 11465.0672043386. The cubic root of 131447766 is about 508.4532993816.

It can be divided in two parts, 13144 and 7766, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 131447766 in words is "one hundred thirty-one million, four hundred forty-seven thousand, seven hundred sixty-six".