163031623 has 4 divisors (see below), whose sum is σ = 163442680. Its totient is φ = 162620568.

The previous prime is 163031543. The next prime is 163031629. The reversal of 163031623 is 326130361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326130361 = 43 ⋅7584427.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163031623 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 (163031629) 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, 204933 + ... + 205726.

It is an arithmetic number, because the mean of its divisors is an integer number (40860670).

Almost surely, 2^163031623 is an apocalyptic number.

163031623 is a deficient number, since it is larger than the sum of its proper divisors (411057).

163031623 is an equidigital number, since it uses as much as digits as its factorization.

163031623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411056.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 163031623 is about 12768.3837270032. The cubic root of 163031623 is about 546.2908804870.

Adding to 163031623 its reverse (326130361), we get a palindrome (489161984).

The spelling of 163031623 in words is "one hundred sixty-three million, thirty-one thousand, six hundred twenty-three".