163444697 has 8 divisors (see below), whose sum is σ = 176246280. Its totient is φ = 150675840.

The previous prime is 163444657. The next prime is 163444703. The reversal of 163444697 is 796444361.

It can be written as a sum of positive squares in 4 ways, for example, as 46566976 + 116877721 = 6824^2 + 10811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163444697 - 2¹⁰ = 163443673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163444637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2747 + ... + 18287.

It is an arithmetic number, because the mean of its divisors is an integer number (22030785).

Almost surely, 2^163444697 is an apocalyptic number.

It is an amenable number.

163444697 is a deficient number, since it is larger than the sum of its proper divisors (12801583).

163444697 is a wasteful number, since it uses less digits than its factorization.

163444697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16363.

The product of its digits is 435456, while the sum is 44.

The square root of 163444697 is about 12784.5491512216. The cubic root of 163444697 is about 546.7518713034.

The spelling of 163444697 in words is "one hundred sixty-three million, four hundred forty-four thousand, six hundred ninety-seven".