105389805387 has 4 divisors (see below), whose sum is σ = 140519740520. Its totient is φ = 70259870256.

The previous prime is 105389805341. The next prime is 105389805427. The reversal of 105389805387 is 783508983501.

It is a happy number.

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

It is not a de Polignac number, because 105389805387 - 2¹⁰ = 105389804363 is a prime.

It is a super-2 number, since 2×105389805387² (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 (105389805317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17564967562 + ... + 17564967567.

It is an arithmetic number, because the mean of its divisors is an integer number (35129935130).

Almost surely, 2^105389805387 is an apocalyptic number.

105389805387 is a deficient number, since it is larger than the sum of its proper divisors (35129935133).

105389805387 is an equidigital number, since it uses as much as digits as its factorization.

105389805387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35129935132.

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 105389805387 in words is "one hundred five billion, three hundred eighty-nine million, eight hundred five thousand, three hundred eighty-seven".