1389417121 has 4 divisors (see below), whose sum is σ = 1397737152. Its totient is φ = 1381097092.

The previous prime is 1389417119. The next prime is 1389417131. The reversal of 1389417121 is 1217149831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1389417121 - 2¹ = 1389417119 is a prime.

It is a super-2 number, since 2×1389417121² = 3860959872255857282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389417131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4159765 + ... + 4160098.

It is an arithmetic number, because the mean of its divisors is an integer number (349434288).

Almost surely, 2^1389417121 is an apocalyptic number.

It is an amenable number.

1389417121 is a deficient number, since it is larger than the sum of its proper divisors (8320031).

1389417121 is an equidigital number, since it uses as much as digits as its factorization.

1389417121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320030.

The product of its digits is 12096, while the sum is 37.

The square root of 1389417121 is about 37274.8859287322. The cubic root of 1389417121 is about 1115.8630119343.

The spelling of 1389417121 in words is "one billion, three hundred eighty-nine million, four hundred seventeen thousand, one hundred twenty-one".