80921419 has 2 divisors, whose sum is σ = 80921420. Its totient is φ = 80921418.

The previous prime is 80921417. The next prime is 80921443. The reversal of 80921419 is 91412908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80921419 - 2¹ = 80921417 is a prime.

It is a super-2 number, since 2×80921419² = 13096552105947122, which contains 22 as substring.

Together with 80921417, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80921417) 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 as a sum of consecutive naturals, namely, 40460709 + 40460710.

It is an arithmetic number, because the mean of its divisors is an integer number (40460710).

Almost surely, 2^80921419 is an apocalyptic number.

80921419 is a deficient number, since it is larger than the sum of its proper divisors (1).

80921419 is an equidigital number, since it uses as much as digits as its factorization.

80921419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 80921419 is about 8995.6333295661. The cubic root of 80921419 is about 432.5349080270.

The spelling of 80921419 in words is "eighty million, nine hundred twenty-one thousand, four hundred nineteen".