80351999 has 16 divisors (see below), whose sum is σ = 101004288. Its totient is φ = 62219232.

The previous prime is 80351983. The next prime is 80352001. The reversal of 80351999 is 99915308.

It is a cyclic number.

It is not a de Polignac number, because 80351999 - 2⁴ = 80351983 is a prime.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80351939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5117 + ... + 13670.

It is an arithmetic number, because the mean of its divisors is an integer number (6312768).

Almost surely, 2^80351999 is an apocalyptic number.

80351999 is a deficient number, since it is larger than the sum of its proper divisors (20652289).

80351999 is a wasteful number, since it uses less digits than its factorization.

80351999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18854.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 80351999 is about 8963.9276547728. The cubic root of 80351999 is about 431.5179790988.

The spelling of 80351999 in words is "eighty million, three hundred fifty-one thousand, nine hundred ninety-nine".