188738245 has 4 divisors (see below), whose sum is σ = 226485900. Its totient is φ = 150990592.

The previous prime is 188738243. The next prime is 188738321. The reversal of 188738245 is 542837881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542837881 = 23 ⋅23601647.

It can be written as a sum of positive squares in 2 ways, for example, as 21242881 + 167495364 = 4609^2 + 12942^2 .

It is a cyclic number.

It is not a de Polignac number, because 188738245 - 2¹ = 188738243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188738195 and 188738204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188738243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18873820 + ... + 18873829.

It is an arithmetic number, because the mean of its divisors is an integer number (56621475).

Almost surely, 2^188738245 is an apocalyptic number.

It is an amenable number.

188738245 is a deficient number, since it is larger than the sum of its proper divisors (37747655).

188738245 is an equidigital number, since it uses as much as digits as its factorization.

188738245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37747654.

The product of its digits is 430080, while the sum is 46.

The square root of 188738245 is about 13738.2038491209. The cubic root of 188738245 is about 573.6143015850.

The spelling of 188738245 in words is "one hundred eighty-eight million, seven hundred thirty-eight thousand, two hundred forty-five".