131473779 has 4 divisors (see below), whose sum is σ = 175298376. Its totient is φ = 87649184.

The previous prime is 131473777. The next prime is 131473781. The reversal of 131473779 is 977374131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977374131 = 3 ⋅325791377.

It is an interprime number because it is at equal distance from previous prime (131473777) and next prime (131473781).

It is a cyclic number.

It is not a de Polignac number, because 131473779 - 2¹ = 131473777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131473779.

It is not an unprimeable number, because it can be changed into a prime (131473777) 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, 21912294 + ... + 21912299.

It is an arithmetic number, because the mean of its divisors is an integer number (43824594).

Almost surely, 2^131473779 is an apocalyptic number.

131473779 is a deficient number, since it is larger than the sum of its proper divisors (43824597).

131473779 is an equidigital number, since it uses as much as digits as its factorization.

131473779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43824596.

The product of its digits is 111132, while the sum is 42.

The square root of 131473779 is about 11466.2015942508. The cubic root of 131473779 is about 508.4868374773.

The spelling of 131473779 in words is "one hundred thirty-one million, four hundred seventy-three thousand, seven hundred seventy-nine".