80899005 has 64 divisors (see below), whose sum is σ = 151289856. Its totient is φ = 36480000.

The previous prime is 80899001. The next prime is 80899043. The reversal of 80899005 is 50099808.

It is not a de Polignac number, because 80899005 - 2² = 80899001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80899001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 423460 + ... + 423650.

It is an arithmetic number, because the mean of its divisors is an integer number (2363904).

Almost surely, 2^80899005 is an apocalyptic number.

80899005 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80899005 is a deficient number, since it is larger than the sum of its proper divisors (70390851).

80899005 is a wasteful number, since it uses less digits than its factorization.

80899005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 80899005 is about 8994.3874166060. The cubic root of 80899005 is about 432.4949691464.

The spelling of 80899005 in words is "eighty million, eight hundred ninety-nine thousand, five".