131166403 has 4 divisors (see below), whose sum is σ = 132123960. Its totient is φ = 130208848.

The previous prime is 131166379. The next prime is 131166461. The reversal of 131166403 is 304661131.

It is a happy number.

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 131166403 - 2²¹ = 129069251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131166103) 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, 478573 + ... + 478846.

It is an arithmetic number, because the mean of its divisors is an integer number (33030990).

Almost surely, 2^131166403 is an apocalyptic number.

131166403 is a deficient number, since it is larger than the sum of its proper divisors (957557).

131166403 is an equidigital number, since it uses as much as digits as its factorization.

131166403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957556.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 131166403 is about 11452.7901840556. The cubic root of 131166403 is about 508.0902600175.

The spelling of 131166403 in words is "one hundred thirty-one million, one hundred sixty-six thousand, four hundred three".