131608353386 has 4 divisors (see below), whose sum is σ = 197412530082. Its totient is φ = 65804176692.

The previous prime is 131608353367. The next prime is 131608353391. The reversal of 131608353386 is 683353806131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 683353806131 = 1753 ⋅389819627.

It can be written as a sum of positive squares in only one way, i.e., 101547382225 + 30060971161 = 318665^2 + 173381^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131608353386.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32902088345 + ... + 32902088348.

Almost surely, 2^131608353386 is an apocalyptic number.

131608353386 is a deficient number, since it is larger than the sum of its proper divisors (65804176696).

131608353386 is an equidigital number, since it uses as much as digits as its factorization.

131608353386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65804176695.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 131608353386 in words is "one hundred thirty-one billion, six hundred eight million, three hundred fifty-three thousand, three hundred eighty-six".