1389048173 has 2 divisors, whose sum is σ = 1389048174. Its totient is φ = 1389048172.

The previous prime is 1389048127. The next prime is 1389048197. The reversal of 1389048173 is 3718409831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1200068164 + 188980009 = 34642^2 + 13747^2 .

It is a cyclic number.

It is not a de Polignac number, because 1389048173 - 2⁶ = 1389048109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389048103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694524086 + 694524087.

It is an arithmetic number, because the mean of its divisors is an integer number (694524087).

Almost surely, 2^1389048173 is an apocalyptic number.

It is an amenable number.

1389048173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389048173 is an equidigital number, since it uses as much as digits as its factorization.

1389048173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1389048173 is about 37269.9365843303. The cubic root of 1389048173 is about 1115.7642338528.

The spelling of 1389048173 in words is "one billion, three hundred eighty-nine million, forty-eight thousand, one hundred seventy-three".