80707905 has 24 divisors (see below), whose sum is σ = 140142912. Its totient is φ = 42967584.

The previous prime is 80707903. The next prime is 80707909. The reversal of 80707905 is 50970708.

It is not a de Polignac number, because 80707905 - 2¹ = 80707903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80707905.

It is not an unprimeable number, because it can be changed into a prime (80707903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31482 + ... + 33948.

It is an arithmetic number, because the mean of its divisors is an integer number (5839288).

Almost surely, 2^80707905 is an apocalyptic number.

It is an amenable number.

80707905 is a deficient number, since it is larger than the sum of its proper divisors (59435007).

80707905 is a wasteful number, since it uses less digits than its factorization.

80707905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205 (or 3202 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 80707905 is about 8983.7578440205. The cubic root of 80707905 is about 432.1541534478.

The spelling of 80707905 in words is "eighty million, seven hundred seven thousand, nine hundred five".