80478981 has 16 divisors (see below), whose sum is σ = 130067520. Its totient is φ = 48774960.

The previous prime is 80478977. The next prime is 80478989. The reversal of 80478981 is 18987408.

It is not a de Polignac number, because 80478981 - 2² = 80478977 is a prime.

It is a super-2 number, since 2×80478981² = 12953732765596722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80478989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135190 + ... + 135783.

It is an arithmetic number, because the mean of its divisors is an integer number (8129220).

Almost surely, 2^80478981 is an apocalyptic number.

It is an amenable number.

80478981 is a deficient number, since it is larger than the sum of its proper divisors (49588539).

80478981 is a wasteful number, since it uses less digits than its factorization.

80478981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270993 (or 270987 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 80478981 is about 8971.0078029171. The cubic root of 80478981 is about 431.7451718566.

The spelling of 80478981 in words is "eighty million, four hundred seventy-eight thousand, nine hundred eighty-one".