80740057 has 2 divisors, whose sum is σ = 80740058. Its totient is φ = 80740056.

The previous prime is 80740039. The next prime is 80740091. The reversal of 80740057 is 75004708.

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., 75151561 + 5588496 = 8669^2 + 2364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80740057 is a prime.

It is not a weakly prime, because it can be changed into another prime (80740007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40370028 + 40370029.

It is an arithmetic number, because the mean of its divisors is an integer number (40370029).

Almost surely, 2^80740057 is an apocalyptic number.

It is an amenable number.

80740057 is a deficient number, since it is larger than the sum of its proper divisors (1).

80740057 is an equidigital number, since it uses as much as digits as its factorization.

80740057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 80740057 is about 8985.5471174548. The cubic root of 80740057 is about 432.2115322785.

The spelling of 80740057 in words is "eighty million, seven hundred forty thousand, fifty-seven".