80708649 has 16 divisors (see below), whose sum is σ = 123110400. Its totient is φ = 46072080.

The previous prime is 80708609. The next prime is 80708657. The reversal of 80708649 is 94680708.

It is a happy number.

It is not a de Polignac number, because 80708649 - 2⁷ = 80708521 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80708649.

It is not an unprimeable number, because it can be changed into a prime (80708609) 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, 37402 + ... + 39500.

It is an arithmetic number, because the mean of its divisors is an integer number (7694400).

Almost surely, 2^80708649 is an apocalyptic number.

It is an amenable number.

80708649 is a deficient number, since it is larger than the sum of its proper divisors (42401751).

80708649 is a wasteful number, since it uses less digits than its factorization.

80708649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 80708649 is about 8983.7992519869. The cubic root of 80708649 is about 432.1554813710.

The spelling of 80708649 in words is "eighty million, seven hundred eight thousand, six hundred forty-nine".