80540899 has 2 divisors, whose sum is σ = 80540900. Its totient is φ = 80540898.

The previous prime is 80540891. The next prime is 80540969. The reversal of 80540899 is 99804508.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80540899 - 2³ = 80540891 is a prime.

It is not a weakly prime, because it can be changed into another prime (80540891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40270449 + 40270450.

It is an arithmetic number, because the mean of its divisors is an integer number (40270450).

Almost surely, 2^80540899 is an apocalyptic number.

80540899 is a deficient number, since it is larger than the sum of its proper divisors (1).

80540899 is an equidigital number, since it uses as much as digits as its factorization.

80540899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 80540899 is about 8974.4581452030. The cubic root of 80540899 is about 431.8558671974.

The spelling of 80540899 in words is "eighty million, five hundred forty thousand, eight hundred ninety-nine".