80912993 has 4 divisors (see below), whose sum is σ = 92472000. Its totient is φ = 69353988.

The previous prime is 80912983. The next prime is 80913017. The reversal of 80912993 is 39921908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80912993 - 2⁴ = 80912977 is a prime.

It is a Duffinian number.

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 80912993.

It is not an unprimeable number, because it can be changed into a prime (80912903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5779493 + ... + 5779506.

It is an arithmetic number, because the mean of its divisors is an integer number (23118000).

Almost surely, 2^80912993 is an apocalyptic number.

It is an amenable number.

80912993 is a deficient number, since it is larger than the sum of its proper divisors (11559007).

80912993 is a wasteful number, since it uses less digits than its factorization.

80912993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11559006.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 80912993 is about 8995.1649790318. The cubic root of 80912993 is about 432.5198948381.

The spelling of 80912993 in words is "eighty million, nine hundred twelve thousand, nine hundred ninety-three".