131442479 has 4 divisors (see below), whose sum is σ = 150219984. Its totient is φ = 112664976.

The previous prime is 131442473. The next prime is 131442517. The reversal of 131442479 is 974244131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 974244131 = 7 ⋅139177733.

It is a cyclic number.

It is not a de Polignac number, because 131442479 - 2²⁴ = 114665263 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 (131442473) 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, 9388742 + ... + 9388755.

It is an arithmetic number, because the mean of its divisors is an integer number (37554996).

Almost surely, 2^131442479 is an apocalyptic number.

131442479 is a deficient number, since it is larger than the sum of its proper divisors (18777505).

131442479 is an equidigital number, since it uses as much as digits as its factorization.

131442479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777504.

The product of its digits is 24192, while the sum is 35.

The square root of 131442479 is about 11464.8366320676. The cubic root of 131442479 is about 508.4464824060.

It can be divided in two parts, 13144247 and 9, that added together give a cube (13144256 = 236³).

The spelling of 131442479 in words is "one hundred thirty-one million, four hundred forty-two thousand, four hundred seventy-nine".