105198439 has 4 divisors (see below), whose sum is σ = 105374080. Its totient is φ = 105022800.

The previous prime is 105198419. The next prime is 105198451. The reversal of 105198439 is 934891501.

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 105198439 - 2⁷ = 105198311 is a prime.

It is a super-2 number, since 2×105198439² = 22133423136073442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105198409) 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, 86919 + ... + 88120.

It is an arithmetic number, because the mean of its divisors is an integer number (26343520).

Almost surely, 2^105198439 is an apocalyptic number.

105198439 is a deficient number, since it is larger than the sum of its proper divisors (175641).

105198439 is an equidigital number, since it uses as much as digits as its factorization.

105198439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175640.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 105198439 is about 10256.6290271219. The cubic root of 105198439 is about 472.0664092497.

The spelling of 105198439 in words is "one hundred five million, one hundred ninety-eight thousand, four hundred thirty-nine".