80827849 has 4 divisors (see below), whose sum is σ = 81295236. Its totient is φ = 80360464.

The previous prime is 80827847. The next prime is 80827853. The reversal of 80827849 is 94872808.

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 65367225 + 15460624 = 8085^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 80827849 - 2¹ = 80827847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80827799 and 80827808.

It is not an unprimeable number, because it can be changed into a prime (80827841) 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, 233434 + ... + 233779.

It is an arithmetic number, because the mean of its divisors is an integer number (20323809).

Almost surely, 2^80827849 is an apocalyptic number.

It is an amenable number.

80827849 is a deficient number, since it is larger than the sum of its proper divisors (467387).

80827849 is a wasteful number, since it uses less digits than its factorization.

80827849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467386.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 80827849 is about 8990.4309685354. The cubic root of 80827849 is about 432.3681293531.

It can be divided in two parts, 8082 and 7849, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 80827849 in words is "eighty million, eight hundred twenty-seven thousand, eight hundred forty-nine".