131823001 has 4 divisors (see below), whose sum is σ = 132292404. Its totient is φ = 131353600.

The previous prime is 131822989. The next prime is 131823017. The reversal of 131823001 is 100328131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100328131 = 3797 ⋅26423.

It can be written as a sum of positive squares in 2 ways, for example, as 96432400 + 35390601 = 9820^2 + 5949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131823001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131823001.

It is not an unprimeable number, because it can be changed into a prime (131823071) 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, 234280 + ... + 234841.

It is an arithmetic number, because the mean of its divisors is an integer number (33073101).

Almost surely, 2^131823001 is an apocalyptic number.

It is an amenable number.

131823001 is a deficient number, since it is larger than the sum of its proper divisors (469403).

131823001 is an equidigital number, since it uses as much as digits as its factorization.

131823001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469402.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 131823001 is about 11481.4198163816. The cubic root of 131823001 is about 508.9366554258.

The spelling of 131823001 in words is "one hundred thirty-one million, eight hundred twenty-three thousand, one".