131478407 has 4 divisors (see below), whose sum is σ = 131514720. Its totient is φ = 131442096.

The previous prime is 131478379. The next prime is 131478433. The reversal of 131478407 is 704874131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131478407 - 2⁶ = 131478343 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 (131478437) 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, 12038 + ... + 20195.

It is an arithmetic number, because the mean of its divisors is an integer number (32878680).

Almost surely, 2^131478407 is an apocalyptic number.

131478407 is a deficient number, since it is larger than the sum of its proper divisors (36313).

131478407 is an equidigital number, since it uses as much as digits as its factorization.

131478407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36312.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 131478407 is about 11466.4034029856. The cubic root of 131478407 is about 508.4928038114.

The spelling of 131478407 in words is "one hundred thirty-one million, four hundred seventy-eight thousand, four hundred seven".