163980375 has 32 divisors (see below), whose sum is σ = 293861568. Its totient is φ = 80726400.

The previous prime is 163980373. The next prime is 163980391. The reversal of 163980375 is 573089361.

It is not a de Polignac number, because 163980375 - 2¹ = 163980373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163980373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11944 + ... + 21693.

It is an arithmetic number, because the mean of its divisors is an integer number (9183174).

Almost surely, 2^163980375 is an apocalyptic number.

163980375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163980375 is a deficient number, since it is larger than the sum of its proper divisors (129881193).

163980375 is a wasteful number, since it uses less digits than its factorization.

163980375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33668 (or 33658 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 163980375 is about 12805.4822244225. The cubic root of 163980375 is about 547.3485329840.

The spelling of 163980375 in words is "one hundred sixty-three million, nine hundred eighty thousand, three hundred seventy-five".