84689477 has 4 divisors (see below), whose sum is σ = 86755116. Its totient is φ = 82623840.

The previous prime is 84689459. The next prime is 84689509. The reversal of 84689477 is 77498648.

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 8755681 + 75933796 = 2959^2 + 8714^2 .

It is a cyclic number.

It is not a de Polignac number, because 84689477 - 2⁸ = 84689221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84689447) 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, 1032758 + ... + 1032839.

It is an arithmetic number, because the mean of its divisors is an integer number (21688779).

Almost surely, 2^84689477 is an apocalyptic number.

It is an amenable number.

84689477 is a deficient number, since it is larger than the sum of its proper divisors (2065639).

84689477 is a wasteful number, since it uses less digits than its factorization.

84689477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065638.

The product of its digits is 2709504, while the sum is 53.

The square root of 84689477 is about 9202.6885745417. The cubic root of 84689477 is about 439.1468955609.

The spelling of 84689477 in words is "eighty-four million, six hundred eighty-nine thousand, four hundred seventy-seven".