80722381 has 2 divisors, whose sum is σ = 80722382. Its totient is φ = 80722380.

The previous prime is 80722373. The next prime is 80722391. The reversal of 80722381 is 18322708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 29528356 = 7155^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 80722381 - 2³ = 80722373 is a prime.

It is a super-2 number, since 2×80722381² = 13032205588618322, which contains 22 as substring.

It is equal to p_4709065 and since 80722381 and 4709065 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80722321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40361190 + 40361191.

It is an arithmetic number, because the mean of its divisors is an integer number (40361191).

Almost surely, 2^80722381 is an apocalyptic number.

It is an amenable number.

80722381 is a deficient number, since it is larger than the sum of its proper divisors (1).

80722381 is an equidigital number, since it uses as much as digits as its factorization.

80722381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 80722381 is about 8984.5634841098. The cubic root of 80722381 is about 432.1799893703.

The spelling of 80722381 in words is "eighty million, seven hundred twenty-two thousand, three hundred eighty-one".