80681679 has 12 divisors (see below), whose sum is σ = 125505016. Its totient is φ = 49650192.

The previous prime is 80681669. The next prime is 80681681. The reversal of 80681679 is 97618608.

It is a happy number.

It is not a de Polignac number, because 80681679 - 2⁴ = 80681663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80681669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344677 + ... + 344910.

Almost surely, 2^80681679 is an apocalyptic number.

80681679 is a deficient number, since it is larger than the sum of its proper divisors (44823337).

80681679 is a wasteful number, since it uses less digits than its factorization.

80681679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689606 (or 689603 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 80681679 is about 8982.2980912459. The cubic root of 80681679 is about 432.1073389394.

The spelling of 80681679 in words is "eighty million, six hundred eighty-one thousand, six hundred seventy-nine".