131949919 has 8 divisors (see below), whose sum is σ = 142129152. Its totient is φ = 122140920.

The previous prime is 131949911. The next prime is 131949941. The reversal of 131949919 is 919949131.

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 131949919 - 2³ = 131949911 is a prime.

It is a super-2 number, since 2×131949919² = 34821562248213122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131949911) 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, 91819 + ... + 93244.

It is an arithmetic number, because the mean of its divisors is an integer number (17766144).

Almost surely, 2^131949919 is an apocalyptic number.

131949919 is a deficient number, since it is larger than the sum of its proper divisors (10179233).

131949919 is a wasteful number, since it uses less digits than its factorization.

131949919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185117.

The product of its digits is 78732, while the sum is 46.

The square root of 131949919 is about 11486.9455905389. The cubic root of 131949919 is about 509.0999362470.

The spelling of 131949919 in words is "one hundred thirty-one million, nine hundred forty-nine thousand, nine hundred nineteen".