105639131197 has 4 divisors (see below), whose sum is σ = 111853197756. Its totient is φ = 99425064640.

The previous prime is 105639131173. The next prime is 105639131203. The reversal of 105639131197 is 791131936501.

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 39212316441 + 66426814756 = 198021^2 + 257734^2 .

It is a cyclic number.

It is not a de Polignac number, because 105639131197 - 2¹¹ = 105639129149 is a prime.

It is a super-2 number, since 2×105639131197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105639131107) 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, 3107033254 + ... + 3107033287.

It is an arithmetic number, because the mean of its divisors is an integer number (27963299439).

Almost surely, 2^105639131197 is an apocalyptic number.

105639131197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

105639131197 is a deficient number, since it is larger than the sum of its proper divisors (6214066559).

105639131197 is an equidigital number, since it uses as much as digits as its factorization.

105639131197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214066558.

The product of its (nonzero) digits is 153090, while the sum is 46.

The spelling of 105639131197 in words is "one hundred five billion, six hundred thirty-nine million, one hundred thirty-one thousand, one hundred ninety-seven".