80257643 has 2 divisors, whose sum is σ = 80257644. Its totient is φ = 80257642.

The previous prime is 80257637. The next prime is 80257711. The reversal of 80257643 is 34675208.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80257643 is a prime.

It is not a weakly prime, because it can be changed into another prime (80257043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40128821 + 40128822.

It is an arithmetic number, because the mean of its divisors is an integer number (40128822).

Almost surely, 2^80257643 is an apocalyptic number.

80257643 is a deficient number, since it is larger than the sum of its proper divisors (1).

80257643 is an equidigital number, since it uses as much as digits as its factorization.

80257643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 80257643 is about 8958.6630140887. The cubic root of 80257643 is about 431.3490048403.

The spelling of 80257643 in words is "eighty million, two hundred fifty-seven thousand, six hundred forty-three".