80999835 has 16 divisors (see below), whose sum is σ = 148114176. Its totient is φ = 37028448.

The previous prime is 80999833. The next prime is 80999839. The reversal of 80999835 is 53899908.

It is not a de Polignac number, because 80999835 - 2¹ = 80999833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80999833) 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 15 ways as a sum of consecutive naturals, for example, 385609 + ... + 385818.

It is an arithmetic number, because the mean of its divisors is an integer number (9257136).

Almost surely, 2^80999835 is an apocalyptic number.

80999835 is a deficient number, since it is larger than the sum of its proper divisors (67114341).

80999835 is a wasteful number, since it uses less digits than its factorization.

80999835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771442.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 80999835 is about 8999.9908333287. The cubic root of 80999835 is about 432.6745773004.

The spelling of 80999835 in words is "eighty million, nine hundred ninety-nine thousand, eight hundred thirty-five".