84539761 has 4 divisors (see below), whose sum is σ = 84600432. Its totient is φ = 84479092.

The previous prime is 84539723. The next prime is 84539803. The reversal of 84539761 is 16793548.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84539761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84539261) 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, 28195 + ... + 31048.

It is an arithmetic number, because the mean of its divisors is an integer number (21150108).

Almost surely, 2^84539761 is an apocalyptic number.

It is an amenable number.

84539761 is a deficient number, since it is larger than the sum of its proper divisors (60671).

84539761 is a wasteful number, since it uses less digits than its factorization.

84539761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60670.

The product of its digits is 181440, while the sum is 43.

The square root of 84539761 is about 9194.5506143585. The cubic root of 84539761 is about 438.8879649348.

The spelling of 84539761 in words is "eighty-four million, five hundred thirty-nine thousand, seven hundred sixty-one".