80827391 has 2 divisors, whose sum is σ = 80827392. Its totient is φ = 80827390.

The previous prime is 80827361. The next prime is 80827399. The reversal of 80827391 is 19372808.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80827391 - 2¹⁰ = 80826367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80827399) by changing a digit.

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 as a sum of consecutive naturals, namely, 40413695 + 40413696.

It is an arithmetic number, because the mean of its divisors is an integer number (40413696).

Almost surely, 2^80827391 is an apocalyptic number.

80827391 is a deficient number, since it is larger than the sum of its proper divisors (1).

80827391 is an equidigital number, since it uses as much as digits as its factorization.

80827391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 80827391 is about 8990.4054969729. The cubic root of 80827391 is about 432.3673126999.

It can be divided in two parts, 80827 and 391, that added together give a palindrome (81218).

The spelling of 80827391 in words is "eighty million, eight hundred twenty-seven thousand, three hundred ninety-one".