131439927 has 4 divisors (see below), whose sum is σ = 175253240. Its totient is φ = 87626616.

The previous prime is 131439923. The next prime is 131439941. The reversal of 131439927 is 729934131.

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

It is not a de Polignac number, because 131439927 - 2² = 131439923 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 (131439923) 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, 21906652 + ... + 21906657.

It is an arithmetic number, because the mean of its divisors is an integer number (43813310).

Almost surely, 2^131439927 is an apocalyptic number.

131439927 is a deficient number, since it is larger than the sum of its proper divisors (43813313).

131439927 is an equidigital number, since it uses as much as digits as its factorization.

131439927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43813312.

The product of its digits is 40824, while the sum is 39.

The square root of 131439927 is about 11464.7253346951. The cubic root of 131439927 is about 508.4431918315.

The spelling of 131439927 in words is "one hundred thirty-one million, four hundred thirty-nine thousand, nine hundred twenty-seven".