131824990469 has 4 divisors (see below), whose sum is σ = 131826311820. Its totient is φ = 131823669120.

The previous prime is 131824990439. The next prime is 131824990471. The reversal of 131824990469 is 964099428131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964099428131 = 7 ⋅137728489733.

It can be written as a sum of positive squares in 2 ways, for example, as 89004965569 + 42820024900 = 298337^2 + 206930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131824990469 is a prime.

It is a super-4 number, since 4×131824990469⁴ (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131824990439) 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, 497612 + ... + 715029.

It is an arithmetic number, because the mean of its divisors is an integer number (32956577955).

Almost surely, 2^131824990469 is an apocalyptic number.

It is an amenable number.

131824990469 is a deficient number, since it is larger than the sum of its proper divisors (1321351).

131824990469 is a wasteful number, since it uses less digits than its factorization.

131824990469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321350.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The spelling of 131824990469 in words is "one hundred thirty-one billion, eight hundred twenty-four million, nine hundred ninety thousand, four hundred sixty-nine".