80447953 has 4 divisors (see below), whose sum is σ = 82622260. Its totient is φ = 78273648.

The previous prime is 80447933. The next prime is 80447963. The reversal of 80447953 is 35974408.

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 57866449 + 22581504 = 7607^2 + 4752^2 .

It is not a de Polignac number, because 80447953 - 2⁵ = 80447921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80447903) 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, 1087098 + ... + 1087171.

It is an arithmetic number, because the mean of its divisors is an integer number (20655565).

Almost surely, 2^80447953 is an apocalyptic number.

It is an amenable number.

80447953 is a deficient number, since it is larger than the sum of its proper divisors (2174307).

80447953 is a wasteful number, since it uses less digits than its factorization.

80447953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174306.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 80447953 is about 8969.2782875770. The cubic root of 80447953 is about 431.6896794742.

The spelling of 80447953 in words is "eighty million, four hundred forty-seven thousand, nine hundred fifty-three".