131668738 has 8 divisors (see below), whose sum is σ = 197663760. Its totient is φ = 65780820.

The previous prime is 131668717. The next prime is 131668739. The reversal of 131668738 is 837866131.

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

It is a junction number, because it is equal to n+sod(n) for n = 131668694 and 131668703.

It is not an unprimeable number, because it can be changed into a prime (131668739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23628 + ... + 28663.

It is an arithmetic number, because the mean of its divisors is an integer number (24707970).

Almost surely, 2^131668738 is an apocalyptic number.

131668738 is a deficient number, since it is larger than the sum of its proper divisors (65995022).

131668738 is a wasteful number, since it uses less digits than its factorization.

131668738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53552.

The product of its digits is 145152, while the sum is 43.

The square root of 131668738 is about 11474.6999089301. The cubic root of 131668738 is about 508.7380539184.

It can be divided in two parts, 13166 and 8738, that added together give a square (21904 = 148²).

The spelling of 131668738 in words is "one hundred thirty-one million, six hundred sixty-eight thousand, seven hundred thirty-eight".