131723191 has 8 divisors (see below), whose sum is σ = 144281520. Its totient is φ = 119699328.

The previous prime is 131723173. The next prime is 131723209. The reversal of 131723191 is 191327131.

It is an interprime number because it is at equal distance from previous prime (131723173) and next prime (131723209).

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 131723191 - 2⁵ = 131723159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131723101) 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, 133101 + ... + 134086.

It is an arithmetic number, because the mean of its divisors is an integer number (18035190).

Almost surely, 2^131723191 is an apocalyptic number.

131723191 is a deficient number, since it is larger than the sum of its proper divisors (12558329).

131723191 is a wasteful number, since it uses less digits than its factorization.

131723191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267233.

The product of its digits is 1134, while the sum is 28.

The square root of 131723191 is about 11477.0724054525. The cubic root of 131723191 is about 508.8081755881.

The spelling of 131723191 in words is "one hundred thirty-one million, seven hundred twenty-three thousand, one hundred ninety-one".