80984545 has 4 divisors (see below), whose sum is σ = 97181460. Its totient is φ = 64787632.

The previous prime is 80984539. The next prime is 80984557. The reversal of 80984545 is 54548908.

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 56610576 + 24373969 = 7524^2 + 4937^2 .

It is a cyclic number.

It is not a de Polignac number, because 80984545 - 2¹⁵ = 80951777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8098450 + ... + 8098459.

It is an arithmetic number, because the mean of its divisors is an integer number (24295365).

Almost surely, 2^80984545 is an apocalyptic number.

It is an amenable number.

80984545 is a deficient number, since it is larger than the sum of its proper divisors (16196915).

80984545 is a wasteful number, since it uses less digits than its factorization.

80984545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16196914.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 80984545 is about 8999.1413479287. The cubic root of 80984545 is about 432.6473508639.

The spelling of 80984545 in words is "eighty million, nine hundred eighty-four thousand, five hundred forty-five".