131203009 has 8 divisors (see below), whose sum is σ = 152404928. Its totient is φ = 110615760.

The previous prime is 131203003. The next prime is 131203043. The reversal of 131203009 is 900302131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131203009 - 2⁹ = 131202497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131203003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153207 + ... + 154060.

It is an arithmetic number, because the mean of its divisors is an integer number (19050616).

Almost surely, 2^131203009 is an apocalyptic number.

It is an amenable number.

131203009 is a deficient number, since it is larger than the sum of its proper divisors (21201919).

131203009 is an equidigital number, since it uses as much as digits as its factorization.

131203009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307335.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 131203009 is about 11454.3881984155. The cubic root of 131203009 is about 508.1375216680.

It can be divided in two parts, 13120 and 3009, that added together give a square (16129 = 127²).

The spelling of 131203009 in words is "one hundred thirty-one million, two hundred three thousand, nine".