131361777 has 16 divisors (see below), whose sum is σ = 194820160. Its totient is φ = 87480000.

The previous prime is 131361773. The next prime is 131361781. The reversal of 131361777 is 777163131.

131361777 is a `hidden beast` number, since 1 + 31 + 3 + 617 + 7 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (131361773) and next prime (131361781).

It is not a de Polignac number, because 131361777 - 2² = 131361773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131361773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30402 + ... + 34452.

It is an arithmetic number, because the mean of its divisors is an integer number (12176260).

Almost surely, 2^131361777 is an apocalyptic number.

It is an amenable number.

131361777 is a deficient number, since it is larger than the sum of its proper divisors (63458383).

131361777 is a wasteful number, since it uses less digits than its factorization.

131361777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261 (or 5255 counting only the distinct ones).

The product of its digits is 18522, while the sum is 36.

The square root of 131361777 is about 11461.3165474129. The cubic root of 131361777 is about 508.3424038036.

The spelling of 131361777 in words is "one hundred thirty-one million, three hundred sixty-one thousand, seven hundred seventy-seven".