80689791 has 16 divisors (see below), whose sum is σ = 132414464. Its totient is φ = 42561504.

The previous prime is 80689783. The next prime is 80689793. The reversal of 80689791 is 19798608.

It is a happy number.

It is not a de Polignac number, because 80689791 - 2³ = 80689783 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 80689791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80689793) 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, 147511 + ... + 148056.

It is an arithmetic number, because the mean of its divisors is an integer number (8275904).

Almost surely, 2^80689791 is an apocalyptic number.

80689791 is a deficient number, since it is larger than the sum of its proper divisors (51724673).

80689791 is a wasteful number, since it uses less digits than its factorization.

80689791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295590.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 80689791 is about 8982.7496347165. The cubic root of 80689791 is about 432.1218202827.

The spelling of 80689791 in words is "eighty million, six hundred eighty-nine thousand, seven hundred ninety-one".