178842049 has 4 divisors (see below), whose sum is σ = 180424836. Its totient is φ = 177259264.

The previous prime is 178842019. The next prime is 178842061. The reversal of 178842049 is 940248871.

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 41835024 + 137007025 = 6468^2 + 11705^2 .

It is a cyclic number.

It is not a de Polignac number, because 178842049 - 2¹¹ = 178840001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 178841996 and 178842014.

It is not an unprimeable number, because it can be changed into a prime (178842019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791224 + ... + 791449.

It is an arithmetic number, because the mean of its divisors is an integer number (45106209).

Almost surely, 2^178842049 is an apocalyptic number.

It is an amenable number.

178842049 is a deficient number, since it is larger than the sum of its proper divisors (1582787).

178842049 is a wasteful number, since it uses less digits than its factorization.

178842049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582786.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 178842049 is about 13373.1839514754. The cubic root of 178842049 is about 563.4082632805.

The spelling of 178842049 in words is "one hundred seventy-eight million, eight hundred forty-two thousand, forty-nine".