188628953 has 4 divisors (see below), whose sum is σ = 188673408. Its totient is φ = 188584500.

The previous prime is 188628949. The next prime is 188628971. The reversal of 188628953 is 359826881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 188628953 - 2² = 188628949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188628983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15101 + ... + 24602.

It is an arithmetic number, because the mean of its divisors is an integer number (47168352).

Almost surely, 2^188628953 is an apocalyptic number.

It is an amenable number.

188628953 is a deficient number, since it is larger than the sum of its proper divisors (44455).

188628953 is an equidigital number, since it uses as much as digits as its factorization.

188628953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44454.

The product of its digits is 829440, while the sum is 50.

The square root of 188628953 is about 13734.2256061272. The cubic root of 188628953 is about 573.5035599262.

The spelling of 188628953 in words is "one hundred eighty-eight million, six hundred twenty-eight thousand, nine hundred fifty-three".