163398709 has 4 divisors (see below), whose sum is σ = 165016620. Its totient is φ = 161780800.

The previous prime is 163398707. The next prime is 163398721. The reversal of 163398709 is 907893361.

163398709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907893361 = 89 ⋅10201049.

It can be written as a sum of positive squares in 2 ways, for example, as 97950609 + 65448100 = 9897^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 163398709 - 2¹ = 163398707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163398707) 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, 808804 + ... + 809005.

It is an arithmetic number, because the mean of its divisors is an integer number (41254155).

Almost surely, 2^163398709 is an apocalyptic number.

It is an amenable number.

163398709 is a deficient number, since it is larger than the sum of its proper divisors (1617911).

163398709 is a wasteful number, since it uses less digits than its factorization.

163398709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617910.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 163398709 is about 12782.7504473803. The cubic root of 163398709 is about 546.7005871195.

The spelling of 163398709 in words is "one hundred sixty-three million, three hundred ninety-eight thousand, seven hundred nine".