827609149 has 4 divisors (see below), whose sum is σ = 847794780. Its totient is φ = 807423520.

The previous prime is 827609099. The next prime is 827609171. The reversal of 827609149 is 941906728.

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 221563225 + 606045924 = 14885^2 + 24618^2 .

It is a cyclic number.

It is not a de Polignac number, because 827609149 - 2¹⁵ = 827576381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 827609099 and 827609108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827601149) 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, 10092754 + ... + 10092835.

It is an arithmetic number, because the mean of its divisors is an integer number (211948695).

Almost surely, 2^827609149 is an apocalyptic number.

It is an amenable number.

827609149 is a deficient number, since it is larger than the sum of its proper divisors (20185631).

827609149 is a wasteful number, since it uses less digits than its factorization.

827609149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20185630.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 827609149 is about 28768.1968326136. The cubic root of 827609149 is about 938.8764110092.

The spelling of 827609149 in words is "eight hundred twenty-seven million, six hundred nine thousand, one hundred forty-nine".