131368172309 has 4 divisors (see below), whose sum is σ = 143310733440. Its totient is φ = 119425611180.

The previous prime is 131368172293. The next prime is 131368172311. The reversal of 131368172309 is 903271863131.

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.

It is a cyclic number.

It is not a de Polignac number, because 131368172309 - 2⁴ = 131368172293 is a prime.

It is a super-2 number, since 2×131368172309² (a number of 23 digits) contains 22 as substring.

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 131368172309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131368172009) 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, 5971280549 + ... + 5971280570.

It is an arithmetic number, because the mean of its divisors is an integer number (35827683360).

Almost surely, 2^131368172309 is an apocalyptic number.

It is an amenable number.

131368172309 is a deficient number, since it is larger than the sum of its proper divisors (11942561131).

131368172309 is a wasteful number, since it uses less digits than its factorization.

131368172309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11942561130.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 131368172309 in words is "one hundred thirty-one billion, three hundred sixty-eight million, one hundred seventy-two thousand, three hundred nine".