1389194725 has 6 divisors (see below), whose sum is σ = 1722601490. Its totient is φ = 1111355760.

The previous prime is 1389194717. The next prime is 1389194731. The reversal of 1389194725 is 5274919831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 128731716 + 1260463009 = 11346^2 + 35503^2 .

It is not a de Polignac number, because 1389194725 - 2³ = 1389194717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27783870 + ... + 27783919.

Almost surely, 2^1389194725 is an apocalyptic number.

It is an amenable number.

1389194725 is a deficient number, since it is larger than the sum of its proper divisors (333406765).

1389194725 is an equidigital number, since it uses as much as digits as its factorization.

1389194725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55567799 (or 55567794 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 1389194725 is about 37271.9026211435. The cubic root of 1389194725 is about 1115.8034721679.

The spelling of 1389194725 in words is "one billion, three hundred eighty-nine million, one hundred ninety-four thousand, seven hundred twenty-five".