105497819 has 4 divisors (see below), whose sum is σ = 120568944. Its totient is φ = 90426696.

The previous prime is 105497813. The next prime is 105497831. The reversal of 105497819 is 918794501.

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

It is a cyclic number.

It is not a de Polignac number, because 105497819 - 2¹² = 105493723 is a prime.

It is a super-2 number, since 2×105497819² = 22259579627513522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105497819.

It is not an unprimeable number, because it can be changed into a prime (105497813) 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, 7535552 + ... + 7535565.

It is an arithmetic number, because the mean of its divisors is an integer number (30142236).

Almost surely, 2^105497819 is an apocalyptic number.

105497819 is a deficient number, since it is larger than the sum of its proper divisors (15071125).

105497819 is an equidigital number, since it uses as much as digits as its factorization.

105497819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15071124.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 105497819 is about 10271.2131221195. The cubic root of 105497819 is about 472.5137967100.

The spelling of 105497819 in words is "one hundred five million, four hundred ninety-seven thousand, eight hundred nineteen".