188149449 has 4 divisors (see below), whose sum is σ = 250865936. Its totient is φ = 125432964.

The previous prime is 188149373. The next prime is 188149469. The reversal of 188149449 is 944941881.

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 not a de Polignac number, because 188149449 - 2¹⁹ = 187625161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 188149398 and 188149407.

It is not an unprimeable number, because it can be changed into a prime (188149469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31358239 + ... + 31358244.

It is an arithmetic number, because the mean of its divisors is an integer number (62716484).

Almost surely, 2^188149449 is an apocalyptic number.

It is an amenable number.

188149449 is a deficient number, since it is larger than the sum of its proper divisors (62716487).

188149449 is an equidigital number, since it uses as much as digits as its factorization.

188149449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62716486.

The product of its digits is 331776, while the sum is 48.

The square root of 188149449 is about 13716.7579624341. The cubic root of 188149449 is about 573.0171895589.

The spelling of 188149449 in words is "one hundred eighty-eight million, one hundred forty-nine thousand, four hundred forty-nine".