178938049 has 4 divisors (see below), whose sum is σ = 179634564. Its totient is φ = 178241536.

The previous prime is 178938043. The next prime is 178938077. The reversal of 178938049 is 940839871.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104857600 + 74080449 = 10240^2 + 8607^2 .

It is a cyclic number.

It is not a de Polignac number, because 178938049 - 2²⁵ = 145383617 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 178937993 and 178938011.

It is not an unprimeable number, because it can be changed into a prime (178938043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347872 + ... + 348385.

It is an arithmetic number, because the mean of its divisors is an integer number (44908641).

Almost surely, 2^178938049 is an apocalyptic number.

It is an amenable number.

178938049 is a deficient number, since it is larger than the sum of its proper divisors (696515).

178938049 is an equidigital number, since it uses as much as digits as its factorization.

178938049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696514.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 178938049 is about 13376.7727423321. The cubic root of 178938049 is about 563.5090552339.

The spelling of 178938049 in words is "one hundred seventy-eight million, nine hundred thirty-eight thousand, forty-nine".