80933985 has 80 divisors (see below), whose sum is σ = 162879552. Its totient is φ = 38102400.

The previous prime is 80933981. The next prime is 80933989. The reversal of 80933985 is 58933908.

It is an interprime number because it is at equal distance from previous prime (80933981) and next prime (80933989).

It is not a de Polignac number, because 80933985 - 2² = 80933981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80933985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80933981) 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 79 ways as a sum of consecutive naturals, for example, 164590 + ... + 165080.

Almost surely, 2^80933985 is an apocalyptic number.

It is an amenable number.

80933985 is an abundant number, since it is smaller than the sum of its proper divisors (81945567).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80933985 is a wasteful number, since it uses less digits than its factorization.

80933985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 80933985 is about 8996.3317524422. The cubic root of 80933985 is about 432.5572958052.

It can be divided in two parts, 80933 and 985, that added together give a palindrome (81918).

The spelling of 80933985 in words is "eighty million, nine hundred thirty-three thousand, nine hundred eighty-five".