80137993 has 4 divisors (see below), whose sum is σ = 86302468. Its totient is φ = 73973520.

The previous prime is 80137973. The next prime is 80138021. The reversal of 80137993 is 39973108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13601344 + 66536649 = 3688^2 + 8157^2 .

It is a cyclic number.

It is not a de Polignac number, because 80137993 - 2⁹ = 80137481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80137973) 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 3 ways as a sum of consecutive naturals, for example, 3082218 + ... + 3082243.

It is an arithmetic number, because the mean of its divisors is an integer number (21575617).

Almost surely, 2^80137993 is an apocalyptic number.

It is an amenable number.

80137993 is a deficient number, since it is larger than the sum of its proper divisors (6164475).

80137993 is a wasteful number, since it uses less digits than its factorization.

80137993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164474.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 80137993 is about 8951.9826295631. The cubic root of 80137993 is about 431.1345431170.

The spelling of 80137993 in words is "eighty million, one hundred thirty-seven thousand, nine hundred ninety-three".