131697550349 has 4 divisors (see below), whose sum is σ = 132645014880. Its totient is φ = 130750085820.

The previous prime is 131697550343. The next prime is 131697550357. The reversal of 131697550349 is 943055796131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131697550349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131697550349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131697550343) 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 3 ways as a sum of consecutive naturals, for example, 473732057 + ... + 473732334.

It is an arithmetic number, because the mean of its divisors is an integer number (33161253720).

Almost surely, 2^131697550349 is an apocalyptic number.

It is an amenable number.

131697550349 is a deficient number, since it is larger than the sum of its proper divisors (947464531).

131697550349 is an equidigital number, since it uses as much as digits as its factorization.

131697550349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947464530.

The product of its (nonzero) digits is 3061800, while the sum is 53.

The spelling of 131697550349 in words is "one hundred thirty-one billion, six hundred ninety-seven million, five hundred fifty thousand, three hundred forty-nine".