80993965 has 8 divisors (see below), whose sum is σ = 104669208. Its totient is φ = 59810880.

The previous prime is 80993959. The next prime is 80993977. The reversal of 80993965 is 56939908.

It can be written as a sum of positive squares in 4 ways, for example, as 191844 + 80802121 = 438^2 + 8989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80993965 - 2⁷ = 80993837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622966 + ... + 623095.

It is an arithmetic number, because the mean of its divisors is an integer number (13083651).

Almost surely, 2^80993965 is an apocalyptic number.

It is an amenable number.

80993965 is a deficient number, since it is larger than the sum of its proper divisors (23675243).

80993965 is a wasteful number, since it uses less digits than its factorization.

80993965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246079.

The product of its (nonzero) digits is 524880, while the sum is 49.

The square root of 80993965 is about 8999.6647159769. The cubic root of 80993965 is about 432.6641251758.

The spelling of 80993965 in words is "eighty million, nine hundred ninety-three thousand, nine hundred sixty-five".