80087761 has 4 divisors (see below), whose sum is σ = 86248372. Its totient is φ = 73927152.

The previous prime is 80087747. The next prime is 80087773. The reversal of 80087761 is 16778008.

It is a happy number.

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 48233025 + 31854736 = 6945^2 + 5644^2 .

It is not a de Polignac number, because 80087761 - 2¹¹ = 80085713 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 80087761.

It is not an unprimeable number, because it can be changed into a prime (80087701) 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 3 ways as a sum of consecutive naturals, for example, 3080286 + ... + 3080311.

It is an arithmetic number, because the mean of its divisors is an integer number (21562093).

Almost surely, 2^80087761 is an apocalyptic number.

It is an amenable number.

80087761 is a deficient number, since it is larger than the sum of its proper divisors (6160611).

80087761 is a wasteful number, since it uses less digits than its factorization.

80087761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160610.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 80087761 is about 8949.1765542982. The cubic root of 80087761 is about 431.0444432110.

The spelling of 80087761 in words is "eighty million, eighty-seven thousand, seven hundred sixty-one".