80099977 has 4 divisors (see below), whose sum is σ = 80181316. Its totient is φ = 80018640.

The previous prime is 80099963. The next prime is 80099983. The reversal of 80099977 is 77999008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69705801 + 10394176 = 8349^2 + 3224^2 .

It is a cyclic number.

It is not a de Polignac number, because 80099977 - 2¹¹ = 80097929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80099977.

It is not an unprimeable number, because it can be changed into a prime (80094977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39174 + ... + 41167.

It is an arithmetic number, because the mean of its divisors is an integer number (20045329).

Almost surely, 2^80099977 is an apocalyptic number.

It is an amenable number.

80099977 is a deficient number, since it is larger than the sum of its proper divisors (81339).

80099977 is an equidigital number, since it uses as much as digits as its factorization.

80099977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81338.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 80099977 is about 8949.8590491694. The cubic root of 80099977 is about 431.0663582167.

The spelling of 80099977 in words is "eighty million, ninety-nine thousand, nine hundred seventy-seven".