80311069 has 2 divisors, whose sum is σ = 80311070. Its totient is φ = 80311068.

The previous prime is 80311067. The next prime is 80311073. The reversal of 80311069 is 96011308.

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., 65772100 + 14538969 = 8110^2 + 3813^2 .

It is a cyclic number.

It is not a de Polignac number, because 80311069 - 2¹ = 80311067 is a prime.

It is a super-2 number, since 2×80311069² = 12899735607845522, which contains 22 as substring.

Together with 80311067, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80311061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40155534 + 40155535.

It is an arithmetic number, because the mean of its divisors is an integer number (40155535).

Almost surely, 2^80311069 is an apocalyptic number.

It is an amenable number.

80311069 is a deficient number, since it is larger than the sum of its proper divisors (1).

80311069 is an equidigital number, since it uses as much as digits as its factorization.

80311069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 80311069 is about 8961.6443245645. The cubic root of 80311069 is about 431.4446972436. Note that the first 3 decimals are identical.

The spelling of 80311069 in words is "eighty million, three hundred eleven thousand, sixty-nine".