80451899 has 4 divisors (see below), whose sum is σ = 87765720. Its totient is φ = 73138080.

The previous prime is 80451883. The next prime is 80451923. The reversal of 80451899 is 99815408.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80451899 - 2⁴ = 80451883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80451809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656894 + ... + 3656915.

It is an arithmetic number, because the mean of its divisors is an integer number (21941430).

Almost surely, 2^80451899 is an apocalyptic number.

80451899 is a deficient number, since it is larger than the sum of its proper divisors (7313821).

80451899 is a wasteful number, since it uses less digits than its factorization.

80451899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7313820.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 80451899 is about 8969.4982579852. The cubic root of 80451899 is about 431.6967375350.

The spelling of 80451899 in words is "eighty million, four hundred fifty-one thousand, eight hundred ninety-nine".