105729489 has 8 divisors (see below), whose sum is σ = 156636320. Its totient is φ = 70486308.

The previous prime is 105729487. The next prime is 105729497. The reversal of 105729489 is 984927501.

It is not a de Polignac number, because 105729489 - 2¹ = 105729487 is a prime.

It is a super-2 number, since 2×105729489² = 22357449688402242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105729487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1957927 + ... + 1957980.

It is an arithmetic number, because the mean of its divisors is an integer number (19579540).

Almost surely, 2^105729489 is an apocalyptic number.

It is an amenable number.

105729489 is a deficient number, since it is larger than the sum of its proper divisors (50906831).

105729489 is an equidigital number, since it uses as much as digits as its factorization.

105729489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915916 (or 3915910 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 105729489 is about 10282.4845732926. The cubic root of 105729489 is about 472.8594191471.

The spelling of 105729489 in words is "one hundred five million, seven hundred twenty-nine thousand, four hundred eighty-nine".