80074781 has 2 divisors, whose sum is σ = 80074782. Its totient is φ = 80074780.

The previous prime is 80074769. The next prime is 80074789. The reversal of 80074781 is 18747008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 38019556 = 6485^2 + 6166^2 .

It is a cyclic number.

It is not a de Polignac number, because 80074781 - 2⁶ = 80074717 is a prime.

It is a super-2 number, since 2×80074781² = 12823941104395922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80074789) 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, 40037390 + 40037391.

It is an arithmetic number, because the mean of its divisors is an integer number (40037391).

Almost surely, 2^80074781 is an apocalyptic number.

It is an amenable number.

80074781 is a deficient number, since it is larger than the sum of its proper divisors (1).

80074781 is an equidigital number, since it uses as much as digits as its factorization.

80074781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 80074781 is about 8948.4513185243. The cubic root of 80074781 is about 431.0211551785.

The spelling of 80074781 in words is "eighty million, seventy-four thousand, seven hundred eighty-one".