131761138 has 4 divisors (see below), whose sum is σ = 197641710. Its totient is φ = 65880568.

The previous prime is 131761109. The next prime is 131761139. The reversal of 131761138 is 831167131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 91527489 + 40233649 = 9567^2 + 6343^2 .

It is not an unprimeable number, because it can be changed into a prime (131761139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32940283 + ... + 32940286.

Almost surely, 2^131761138 is an apocalyptic number.

131761138 is a deficient number, since it is larger than the sum of its proper divisors (65880572).

131761138 is an equidigital number, since it uses as much as digits as its factorization.

131761138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65880571.

The product of its digits is 3024, while the sum is 31.

The square root of 131761138 is about 11478.7254518958. The cubic root of 131761138 is about 508.8570302859.

The spelling of 131761138 in words is "one hundred thirty-one million, seven hundred sixty-one thousand, one hundred thirty-eight".