1385044173 has 6 divisors (see below), whose sum is σ = 2000619374. Its totient is φ = 923362776.

The previous prime is 1385044169. The next prime is 1385044187. The reversal of 1385044173 is 3714405831.

It is a happy number.

1385044173 is a `hidden beast` number, since 138 + 504 + 4 + 17 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1369148004 + 15896169 = 37002^2 + 3987^2 .

It is not a de Polignac number, because 1385044173 - 2² = 1385044169 is a prime.

It is a super-2 number, since 2×1385044173² = 3836694722322507858, 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 (1385044103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76946890 + ... + 76946907.

Almost surely, 2^1385044173 is an apocalyptic number.

It is an amenable number.

1385044173 is a deficient number, since it is larger than the sum of its proper divisors (615575201).

1385044173 is a wasteful number, since it uses less digits than its factorization.

1385044173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153893803 (or 153893800 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1385044173 is about 37216.1816015561. The cubic root of 1385044173 is about 1114.6911202435.

The spelling of 1385044173 in words is "one billion, three hundred eighty-five million, forty-four thousand, one hundred seventy-three".