80801869 has 2 divisors, whose sum is σ = 80801870. Its totient is φ = 80801868.

The previous prime is 80801863. The next prime is 80801887. The reversal of 80801869 is 96810808.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77668969 + 3132900 = 8813^2 + 1770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80801869 is a prime.

It is a super-2 number, since 2×80801869² = 13057884067786322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80801863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40400934 + 40400935.

It is an arithmetic number, because the mean of its divisors is an integer number (40400935).

Almost surely, 2^80801869 is an apocalyptic number.

It is an amenable number.

80801869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80801869 is an equidigital number, since it uses as much as digits as its factorization.

80801869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 80801869 is about 8988.9859828570. The cubic root of 80801869 is about 432.3217999099.

The spelling of 80801869 in words is "eighty million, eight hundred one thousand, eight hundred sixty-nine".