131323966 has 4 divisors (see below), whose sum is σ = 196985952. Its totient is φ = 65661982.

The previous prime is 131323961. The next prime is 131323979. The reversal of 131323966 is 669323131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669323131 = 7951 ⋅84181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131323961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32830990 + ... + 32830993.

It is an arithmetic number, because the mean of its divisors is an integer number (49246488).

Almost surely, 2^131323966 is an apocalyptic number.

131323966 is a deficient number, since it is larger than the sum of its proper divisors (65661986).

131323966 is an equidigital number, since it uses as much as digits as its factorization.

131323966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65661985.

The product of its digits is 17496, while the sum is 34.

The square root of 131323966 is about 11459.6669236065. Note that the first 3 decimals coincide. The cubic root of 131323966 is about 508.2936255884.

The spelling of 131323966 in words is "one hundred thirty-one million, three hundred twenty-three thousand, nine hundred sixty-six".