131904449 has 4 divisors (see below), whose sum is σ = 132694464. Its totient is φ = 131114436.

The previous prime is 131904433. The next prime is 131904469. The reversal of 131904449 is 944409131.

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 131904449 - 2⁴ = 131904433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131904469) 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, 394757 + ... + 395090.

It is an arithmetic number, because the mean of its divisors is an integer number (33173616).

Almost surely, 2^131904449 is an apocalyptic number.

It is an amenable number.

131904449 is a deficient number, since it is larger than the sum of its proper divisors (790015).

131904449 is an equidigital number, since it uses as much as digits as its factorization.

131904449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790014.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 131904449 is about 11484.9662167548. The cubic root of 131904449 is about 509.0414508413.

The spelling of 131904449 in words is "one hundred thirty-one million, nine hundred four thousand, four hundred forty-nine".