188918974 has 4 divisors (see below), whose sum is σ = 283378464. Its totient is φ = 94459486.

The previous prime is 188918971. The next prime is 188918981. The reversal of 188918974 is 479819881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479819881 = 20681 ⋅23201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188918971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47229742 + ... + 47229745.

It is an arithmetic number, because the mean of its divisors is an integer number (70844616).

Almost surely, 2^188918974 is an apocalyptic number.

188918974 is a deficient number, since it is larger than the sum of its proper divisors (94459490).

188918974 is an equidigital number, since it uses as much as digits as its factorization.

188918974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94459489.

The product of its digits is 1161216, while the sum is 55.

The square root of 188918974 is about 13744.7798818315. The cubic root of 188918974 is about 573.7973340291.

The spelling of 188918974 in words is "one hundred eighty-eight million, nine hundred eighteen thousand, nine hundred seventy-four".