80405243 has 2 divisors, whose sum is σ = 80405244. Its totient is φ = 80405242.

The previous prime is 80405233. The next prime is 80405251. The reversal of 80405243 is 34250408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80405243 - 2¹² = 80401147 is a prime.

It is not a weakly prime, because it can be changed into another prime (80405233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40202621 + 40202622.

It is an arithmetic number, because the mean of its divisors is an integer number (40202622).

Almost surely, 2^80405243 is an apocalyptic number.

80405243 is a deficient number, since it is larger than the sum of its proper divisors (1).

80405243 is an equidigital number, since it uses as much as digits as its factorization.

80405243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 80405243 is about 8966.8970664327. The cubic root of 80405243 is about 431.6132709421.

The spelling of 80405243 in words is "eighty million, four hundred five thousand, two hundred forty-three".