131227979 has 4 divisors (see below), whose sum is σ = 132063984. Its totient is φ = 130391976.

The previous prime is 131227973. The next prime is 131227997. The reversal of 131227979 is 979722131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979722131 = 277 ⋅3536903.

It is a cyclic number.

It is not a de Polignac number, because 131227979 - 2¹⁶ = 131162443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131227973) 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, 417767 + ... + 418080.

It is an arithmetic number, because the mean of its divisors is an integer number (33015996).

Almost surely, 2^131227979 is an apocalyptic number.

131227979 is a deficient number, since it is larger than the sum of its proper divisors (836005).

131227979 is an equidigital number, since it uses as much as digits as its factorization.

131227979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836004.

The product of its digits is 47628, while the sum is 41.

The square root of 131227979 is about 11455.4781218420. The cubic root of 131227979 is about 508.1697551490.

The spelling of 131227979 in words is "one hundred thirty-one million, two hundred twenty-seven thousand, nine hundred seventy-nine".