80919493 has 2 divisors, whose sum is σ = 80919494. Its totient is φ = 80919492.

The previous prime is 80919491. The next prime is 80919533. The reversal of 80919493 is 39491908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57426084 + 23493409 = 7578^2 + 4847^2 .

It is a cyclic number.

It is not a de Polignac number, because 80919493 - 2¹ = 80919491 is a prime.

Together with 80919491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80919491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459746 + 40459747.

It is an arithmetic number, because the mean of its divisors is an integer number (40459747).

Almost surely, 2^80919493 is an apocalyptic number.

It is an amenable number.

80919493 is a deficient number, since it is larger than the sum of its proper divisors (1).

80919493 is an equidigital number, since it uses as much as digits as its factorization.

80919493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 80919493 is about 8995.5262769890. The cubic root of 80919493 is about 432.5314764310.

It can be divided in two parts, 809 and 19493, that added together give a palindrome (20302).

The spelling of 80919493 in words is "eighty million, nine hundred nineteen thousand, four hundred ninety-three".