105849769897 has 4 divisors (see below), whose sum is σ = 105862414036. Its totient is φ = 105837125760.

The previous prime is 105849769889. The next prime is 105849769931. The reversal of 105849769897 is 798967948501.

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 51909242896 + 53940527001 = 227836^2 + 232251^2 .

It is a cyclic number.

It is not a de Polignac number, because 105849769897 - 2³ = 105849769889 is a prime.

It is a super-2 number, since 2×105849769897² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105849769807) 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, 6309504 + ... + 6326257.

It is an arithmetic number, because the mean of its divisors is an integer number (26465603509).

Almost surely, 2^105849769897 is an apocalyptic number.

It is an amenable number.

105849769897 is a deficient number, since it is larger than the sum of its proper divisors (12644139).

105849769897 is an equidigital number, since it uses as much as digits as its factorization.

105849769897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12644138.

The product of its (nonzero) digits is 274337280, while the sum is 73.

The spelling of 105849769897 in words is "one hundred five billion, eight hundred forty-nine million, seven hundred sixty-nine thousand, eight hundred ninety-seven".