1389875105 has 8 divisors (see below), whose sum is σ = 1690697832. Its totient is φ = 1096668288.

The previous prime is 1389875059. The next prime is 1389875107. The reversal of 1389875105 is 5015789831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 399640081 + 990235024 = 19991^2 + 31468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1389875105 - 2⁶ = 1389875041 is a prime.

It is a super-2 number, since 2×1389875105² = 3863505614997522050, 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 1389875105.

It is not an unprimeable number, because it can be changed into a prime (1389875107) 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, 1903574 + ... + 1904303.

It is an arithmetic number, because the mean of its divisors is an integer number (211337229).

Almost surely, 2^1389875105 is an apocalyptic number.

It is an amenable number.

1389875105 is a deficient number, since it is larger than the sum of its proper divisors (300822727).

1389875105 is an equidigital number, since it uses as much as digits as its factorization.

1389875105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807955.

The product of its (nonzero) digits is 302400, while the sum is 47.

The square root of 1389875105 is about 37281.0287545824. The cubic root of 1389875105 is about 1115.9856032131.

The spelling of 1389875105 in words is "one billion, three hundred eighty-nine million, eight hundred seventy-five thousand, one hundred five".