131428323 has 12 divisors (see below), whose sum is σ = 204444240. Its totient is φ = 80878896.

The previous prime is 131428267. The next prime is 131428327. The reversal of 131428323 is 323824131.

131428323 is a `hidden beast` number, since 1 + 314 + 28 + 323 = 666.

131428323 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 131428323 - 2⁸ = 131428067 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (131428327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561543 + ... + 561776.

It is an arithmetic number, because the mean of its divisors is an integer number (17037020).

Almost surely, 2^131428323 is an apocalyptic number.

131428323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

131428323 is a deficient number, since it is larger than the sum of its proper divisors (73015917).

131428323 is a wasteful number, since it uses less digits than its factorization.

131428323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123338 (or 1123335 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 131428323 is about 11464.2192494736. The cubic root of 131428323 is about 508.4282289797.

The spelling of 131428323 in words is "one hundred thirty-one million, four hundred twenty-eight thousand, three hundred twenty-three".