80336691 has 10 divisors (see below), whose sum is σ = 120009252. Its totient is φ = 53557740.

The previous prime is 80336689. The next prime is 80336749. The reversal of 80336691 is 19663308.

It is a happy number.

It is not a de Polignac number, because 80336691 - 2¹ = 80336689 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (80336621) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 495825 + ... + 495986.

Almost surely, 2^80336691 is an apocalyptic number.

80336691 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80336691 is a deficient number, since it is larger than the sum of its proper divisors (39672561).

80336691 is an equidigital number, since it uses as much as digits as its factorization.

80336691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991823 (or 991814 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 80336691 is about 8963.0737473257. The cubic root of 80336691 is about 431.4905742765.

Adding to 80336691 its reverse (19663308), we get a palindrome (99999999).

The spelling of 80336691 in words is "eighty million, three hundred thirty-six thousand, six hundred ninety-one".