1396166173 has 2 divisors, whose sum is σ = 1396166174. Its totient is φ = 1396166172.

The previous prime is 1396166159. The next prime is 1396166243. The reversal of 1396166173 is 3716616931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 746273124 + 649893049 = 27318^2 + 25493^2 .

It is an emirp because it is prime and its reverse (3716616931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1396166173 - 2⁵ = 1396166141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396166143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698083086 + 698083087.

It is an arithmetic number, because the mean of its divisors is an integer number (698083087).

Almost surely, 2^1396166173 is an apocalyptic number.

It is an amenable number.

1396166173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396166173 is an equidigital number, since it uses as much as digits as its factorization.

1396166173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 1396166173 is about 37365.3070775552. The cubic root of 1396166173 is about 1117.6668514201. Note that the first 3 decimals are identical.

The spelling of 1396166173 in words is "one billion, three hundred ninety-six million, one hundred sixty-six thousand, one hundred seventy-three".