131187956 has 6 divisors (see below), whose sum is σ = 229578930. Its totient is φ = 65593976.

The previous prime is 131187949. The next prime is 131187961. The reversal of 131187956 is 659781131.

It can be written as a sum of positive squares in only one way, i.e., 83356900 + 47831056 = 9130^2 + 6916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16398491 + ... + 16398498.

It is an arithmetic number, because the mean of its divisors is an integer number (38263155).

Almost surely, 2^131187956 is an apocalyptic number.

It is an amenable number.

131187956 is a deficient number, since it is larger than the sum of its proper divisors (98390974).

131187956 is a wasteful number, since it uses less digits than its factorization.

131187956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32796993 (or 32796991 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The square root of 131187956 is about 11453.7310951497. The cubic root of 131187956 is about 508.1180879504.

The spelling of 131187956 in words is "one hundred thirty-one million, one hundred eighty-seven thousand, nine hundred fifty-six".