80305965 has 48 divisors (see below), whose sum is σ = 147758400. Its totient is φ = 41381280.

The previous prime is 80305963. The next prime is 80305969. The reversal of 80305965 is 56950308.

It is not a de Polignac number, because 80305965 - 2¹ = 80305963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80305963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129426 + ... + 130044.

It is an arithmetic number, because the mean of its divisors is an integer number (3078300).

Almost surely, 2^80305965 is an apocalyptic number.

It is an amenable number.

80305965 is a deficient number, since it is larger than the sum of its proper divisors (67452435).

80305965 is a wasteful number, since it uses less digits than its factorization.

80305965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 80305965 is about 8961.3595508717. The cubic root of 80305965 is about 431.4355571985.

The spelling of 80305965 in words is "eighty million, three hundred five thousand, nine hundred sixty-five".