80437681 has 2 divisors, whose sum is σ = 80437682. Its totient is φ = 80437680.

The previous prime is 80437663. The next prime is 80437699. The reversal of 80437681 is 18673408.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (80437663) and next prime (80437699).

It can be written as a sum of positive squares in only one way, i.e., 60590656 + 19847025 = 7784^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 80437681 - 2⁹ = 80437169 is a prime.

It is a super-2 number, since 2×80437681² = 12940441049315522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_4693447 and since 80437681 and 4693447 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80437681.

It is not a weakly prime, because it can be changed into another prime (80437381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40218840 + 40218841.

It is an arithmetic number, because the mean of its divisors is an integer number (40218841).

Almost surely, 2^80437681 is an apocalyptic number.

It is an amenable number.

80437681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80437681 is an equidigital number, since it uses as much as digits as its factorization.

80437681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 80437681 is about 8968.7056479740. The cubic root of 80437681 is about 431.6713052544.

It can be divided in two parts, 80437 and 681, that added together give a palindrome (81118).

The spelling of 80437681 in words is "eighty million, four hundred thirty-seven thousand, six hundred eighty-one".