131466393491 has 4 divisors (see below), whose sum is σ = 131557249392. Its totient is φ = 131375537592.

The previous prime is 131466393469. The next prime is 131466393497. The reversal of 131466393491 is 194393664131.

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

It is a cyclic number.

It is not a de Polignac number, because 131466393491 - 2¹⁰ = 131466392467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131466393497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45425780 + ... + 45428673.

It is an arithmetic number, because the mean of its divisors is an integer number (32889312348).

Almost surely, 2^131466393491 is an apocalyptic number.

131466393491 is a deficient number, since it is larger than the sum of its proper divisors (90855901).

131466393491 is an equidigital number, since it uses as much as digits as its factorization.

131466393491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90855900.

The product of its digits is 1259712, while the sum is 50.

The spelling of 131466393491 in words is "one hundred thirty-one billion, four hundred sixty-six million, three hundred ninety-three thousand, four hundred ninety-one".