1389825013 has 4 divisors (see below), whose sum is σ = 1390782988. Its totient is φ = 1388867040.

The previous prime is 1389825001. The next prime is 1389825079. The reversal of 1389825013 is 3105289831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3105289831 = 7 ⋅443612833.

It can be written as a sum of positive squares in 2 ways, for example, as 1305882769 + 83942244 = 36137^2 + 9162^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389825013 - 2¹³ = 1389816821 is a prime.

It is a super-2 number, since 2×1389825013² = 3863227133520900338, 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 (1389825113) 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, 476808 + ... + 479713.

It is an arithmetic number, because the mean of its divisors is an integer number (347695747).

Almost surely, 2^1389825013 is an apocalyptic number.

It is an amenable number.

1389825013 is a deficient number, since it is larger than the sum of its proper divisors (957975).

1389825013 is an equidigital number, since it uses as much as digits as its factorization.

1389825013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957974.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 1389825013 is about 37280.3569323042. The cubic root of 1389825013 is about 1115.9721961038.

The spelling of 1389825013 in words is "one billion, three hundred eighty-nine million, eight hundred twenty-five thousand, thirteen".