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80047481 is a prime number
BaseRepresentation
bin1001100010101…
…10110101111001
312120121211111112
410301112311321
5130443004411
611535410105
71661251403
oct461266571
9176554445
1080047481
1141203948
1222983935
1313778b97
14a8b9b73
157062b8b
hex4c56d79

80047481 has 2 divisors, whose sum is σ = 80047482. Its totient is φ = 80047480.

The previous prime is 80047477. The next prime is 80047519. The reversal of 80047481 is 18474008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77721856 + 2325625 = 8816^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 80047481 - 22 = 80047477 is a prime.

It is a super-2 number, since 2×800474812 = 12815198428890722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80046481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40023740 + 40023741.

It is an arithmetic number, because the mean of its divisors is an integer number (40023741).

Almost surely, 280047481 is an apocalyptic number.

It is an amenable number.

80047481 is a deficient number, since it is larger than the sum of its proper divisors (1).

80047481 is an equidigital number, since it uses as much as digits as its factorization.

80047481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 80047481 is about 8946.9257848716. The cubic root of 80047481 is about 430.9721667418.

The spelling of 80047481 in words is "eighty million, forty-seven thousand, four hundred eighty-one".