80916399 has 12 divisors (see below), whose sum is σ = 117801216. Its totient is φ = 53518752.

The previous prime is 80916391. The next prime is 80916401. The reversal of 80916399 is 99361908.

80916399 is a `hidden beast` number, since 8 + 0 + 9 + 1 + 639 + 9 = 666.

It is not a de Polignac number, because 80916399 - 2³ = 80916391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80916391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34254 + ... + 36539.

It is an arithmetic number, because the mean of its divisors is an integer number (9816768).

Almost surely, 2^80916399 is an apocalyptic number.

80916399 is a deficient number, since it is larger than the sum of its proper divisors (36884817).

80916399 is a wasteful number, since it uses less digits than its factorization.

80916399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70926 (or 70923 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 80916399 is about 8995.3543009711. The cubic root of 80916399 is about 432.5259636701.

The spelling of 80916399 in words is "eighty million, nine hundred sixteen thousand, three hundred ninety-nine".