80909547 has 4 divisors (see below), whose sum is σ = 107879400. Its totient is φ = 53939696.

The previous prime is 80909527. The next prime is 80909557. The reversal of 80909547 is 74590908.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80909547 - 2¹⁰ = 80908523 is a prime.

It is a super-4 number, since 4×80909547⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80909499 and 80909508.

It is not an unprimeable number, because it can be changed into a prime (80909527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13484922 + ... + 13484927.

It is an arithmetic number, because the mean of its divisors is an integer number (26969850).

Almost surely, 2^80909547 is an apocalyptic number.

80909547 is a deficient number, since it is larger than the sum of its proper divisors (26969853).

80909547 is a wasteful number, since it uses less digits than its factorization.

80909547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26969852.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 80909547 is about 8994.9734296439. The cubic root of 80909547 is about 432.5137545605.

The spelling of 80909547 in words is "eighty million, nine hundred nine thousand, five hundred forty-seven".