163969874 has 4 divisors (see below), whose sum is σ = 245954814. Its totient is φ = 81984936.

The previous prime is 163969853. The next prime is 163969889. The reversal of 163969874 is 478969361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 163968025 + 1849 = 12805^2 + 43^2 .

It is a super-2 number, since 2×163969874² = 53772239159151752, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40992467 + ... + 40992470.

Almost surely, 2^163969874 is an apocalyptic number.

163969874 is a deficient number, since it is larger than the sum of its proper divisors (81984940).

163969874 is an equidigital number, since it uses as much as digits as its factorization.

163969874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81984939.

The product of its digits is 1959552, while the sum is 53.

The square root of 163969874 is about 12805.0721981565. The cubic root of 163969874 is about 547.3368490052.

The spelling of 163969874 in words is "one hundred sixty-three million, nine hundred sixty-nine thousand, eight hundred seventy-four".