131333009 has 4 divisors (see below), whose sum is σ = 131614704. Its totient is φ = 131051316.

The previous prime is 131333003. The next prime is 131333011. The reversal of 131333009 is 900333131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900333131 = 1097 ⋅820723.

It is a cyclic number.

It is not a de Polignac number, because 131333009 - 2⁸ = 131332753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131333003) 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, 140147 + ... + 141080.

It is an arithmetic number, because the mean of its divisors is an integer number (32903676).

Almost surely, 2^131333009 is an apocalyptic number.

It is an amenable number.

131333009 is a deficient number, since it is larger than the sum of its proper divisors (281695).

131333009 is an equidigital number, since it uses as much as digits as its factorization.

131333009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281694.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 131333009 is about 11460.0614745297. The cubic root of 131333009 is about 508.3052923945.

The spelling of 131333009 in words is "one hundred thirty-one million, three hundred thirty-three thousand, nine".