131919439 has 8 divisors (see below), whose sum is σ = 139918320. Its totient is φ = 123947136.

The previous prime is 131919409. The next prime is 131919499. The reversal of 131919439 is 934919131.

It is a happy number.

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

It is not a de Polignac number, because 131919439 - 2¹⁹ = 131395151 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 (131919409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4092 + ... + 16750.

It is an arithmetic number, because the mean of its divisors is an integer number (17489790).

Almost surely, 2^131919439 is an apocalyptic number.

131919439 is a deficient number, since it is larger than the sum of its proper divisors (7998881).

131919439 is a wasteful number, since it uses less digits than its factorization.

131919439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13289.

The product of its digits is 26244, while the sum is 40.

The square root of 131919439 is about 11485.6187904701. The cubic root of 131919439 is about 509.0607330879.

The spelling of 131919439 in words is "one hundred thirty-one million, nine hundred nineteen thousand, four hundred thirty-nine".