163953390 has 32 divisors (see below), whose sum is σ = 401863680. Its totient is φ = 42790304.

The previous prime is 163953379. The next prime is 163953403. The reversal of 163953390 is 93359361.

163953390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56730 + ... + 59549.

It is an arithmetic number, because the mean of its divisors is an integer number (12558240).

Almost surely, 2^163953390 is an apocalyptic number.

163953390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163953390 is an abundant number, since it is smaller than the sum of its proper divisors (237910290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163953390 is a wasteful number, since it uses less digits than its factorization.

163953390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116336.

The product of its (nonzero) digits is 65610, while the sum is 39.

The square root of 163953390 is about 12804.4285307857. The cubic root of 163953390 is about 547.3185070120.

The spelling of 163953390 in words is "one hundred sixty-three million, nine hundred fifty-three thousand, three hundred ninety".