84077761 has 4 divisors (see below), whose sum is σ = 84111300. Its totient is φ = 84044224.

The previous prime is 84077743. The next prime is 84077779. The reversal of 84077761 is 16777048.

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

It is an interprime number because it is at equal distance from previous prime (84077743) and next prime (84077779).

It can be written as a sum of positive squares in 2 ways, for example, as 76895361 + 7182400 = 8769^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 84077761 - 2⁹ = 84077249 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84071761) 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, 12676 + ... + 18133.

It is an arithmetic number, because the mean of its divisors is an integer number (21027825).

Almost surely, 2^84077761 is an apocalyptic number.

It is an amenable number.

84077761 is a deficient number, since it is larger than the sum of its proper divisors (33539).

84077761 is a wasteful number, since it uses less digits than its factorization.

84077761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33538.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 84077761 is about 9169.3926189252. The cubic root of 84077761 is about 438.0870134946.

The spelling of 84077761 in words is "eighty-four million, seventy-seven thousand, seven hundred sixty-one".