80349021 has 12 divisors (see below), whose sum is σ = 122886972. Its totient is φ = 50414976.

The previous prime is 80349019. The next prime is 80349029. The reversal of 80349021 is 12094308.

It can be written as a sum of positive squares in 2 ways, for example, as 42968025 + 37380996 = 6555^2 + 6114^2 .

It is not a de Polignac number, because 80349021 - 2¹ = 80349019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80349029) 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 11 ways as a sum of consecutive naturals, for example, 262426 + ... + 262731.

It is an arithmetic number, because the mean of its divisors is an integer number (10240581).

Almost surely, 2^80349021 is an apocalyptic number.

It is an amenable number.

80349021 is a deficient number, since it is larger than the sum of its proper divisors (42537951).

80349021 is a wasteful number, since it uses less digits than its factorization.

80349021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525180 (or 525177 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 80349021 is about 8963.7615430131. The cubic root of 80349021 is about 431.5126480701.

The spelling of 80349021 in words is "eighty million, three hundred forty-nine thousand, twenty-one".