131746477 has 4 divisors (see below), whose sum is σ = 132059836. Its totient is φ = 131433120.

The previous prime is 131746471. The next prime is 131746493. The reversal of 131746477 is 774647131.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30261001 + 101485476 = 5501^2 + 10074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131746477 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 (131746471) 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, 156048 + ... + 156889.

It is an arithmetic number, because the mean of its divisors is an integer number (33014959).

Almost surely, 2^131746477 is an apocalyptic number.

It is an amenable number.

131746477 is a deficient number, since it is larger than the sum of its proper divisors (313359).

131746477 is an equidigital number, since it uses as much as digits as its factorization.

131746477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313358.

The product of its digits is 98784, while the sum is 40.

The square root of 131746477 is about 11478.0868179327. The cubic root of 131746477 is about 508.8381561582.

The spelling of 131746477 in words is "one hundred thirty-one million, seven hundred forty-six thousand, four hundred seventy-seven".