163990623 has 8 divisors (see below), whose sum is σ = 224563888. Its totient is φ = 106372224.

The previous prime is 163990601. The next prime is 163990627. The reversal of 163990623 is 326099361.

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

It is not a de Polignac number, because 163990623 - 2⁵ = 163990591 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 (163990627) 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, 738586 + ... + 738807.

It is an arithmetic number, because the mean of its divisors is an integer number (28070486).

Almost surely, 2^163990623 is an apocalyptic number.

163990623 is a deficient number, since it is larger than the sum of its proper divisors (60573265).

163990623 is a wasteful number, since it uses less digits than its factorization.

163990623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477433.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 163990623 is about 12805.8823592910. The cubic root of 163990623 is about 547.3599349803.

The spelling of 163990623 in words is "one hundred sixty-three million, nine hundred ninety thousand, six hundred twenty-three".