80273909 has 2 divisors, whose sum is σ = 80273910. Its totient is φ = 80273908.

The previous prime is 80273873. The next prime is 80273923. The reversal of 80273909 is 90937208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 37332100 = 6553^2 + 6110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80273909 is a prime.

It is a super-2 number, since 2×80273909² = 12887800932280562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80273969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40136954 + 40136955.

It is an arithmetic number, because the mean of its divisors is an integer number (40136955).

Almost surely, 2^80273909 is an apocalyptic number.

It is an amenable number.

80273909 is a deficient number, since it is larger than the sum of its proper divisors (1).

80273909 is an equidigital number, since it uses as much as digits as its factorization.

80273909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 80273909 is about 8959.5708044526. The cubic root of 80273909 is about 431.3781437015.

The spelling of 80273909 in words is "eighty million, two hundred seventy-three thousand, nine hundred nine".