80492681 has 2 divisors, whose sum is σ = 80492682. Its totient is φ = 80492680.

The previous prime is 80492677. The next prime is 80492693. The reversal of 80492681 is 18629408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 11868025 = 8284^2 + 3445^2 .

It is a cyclic number.

It is not a de Polignac number, because 80492681 - 2² = 80492677 is a prime.

It is a super-2 number, since 2×80492681² = 12958143389135522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80492641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40246340 + 40246341.

It is an arithmetic number, because the mean of its divisors is an integer number (40246341).

Almost surely, 2^80492681 is an apocalyptic number.

It is an amenable number.

80492681 is a deficient number, since it is larger than the sum of its proper divisors (1).

80492681 is an equidigital number, since it uses as much as digits as its factorization.

80492681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 80492681 is about 8971.7713412681. The cubic root of 80492681 is about 431.7696692396.

The spelling of 80492681 in words is "eighty million, four hundred ninety-two thousand, six hundred eighty-one".