80643503 has 2 divisors, whose sum is σ = 80643504. Its totient is φ = 80643502.

The previous prime is 80643487. The next prime is 80643517. The reversal of 80643503 is 30534608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80643503 - 2⁴ = 80643487 is a prime.

It is a super-2 number, since 2×80643503² = 13006749152222018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80643553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40321751 + 40321752.

It is an arithmetic number, because the mean of its divisors is an integer number (40321752).

Almost surely, 2^80643503 is an apocalyptic number.

80643503 is a deficient number, since it is larger than the sum of its proper divisors (1).

80643503 is an equidigital number, since it uses as much as digits as its factorization.

80643503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 80643503 is about 8980.1727711665. The cubic root of 80643503 is about 432.0391750453.

The spelling of 80643503 in words is "eighty million, six hundred forty-three thousand, five hundred three".