84675861 has 20 divisors (see below), whose sum is σ = 133933932. Its totient is φ = 53129088.

The previous prime is 84675791. The next prime is 84675889. The reversal of 84675861 is 16857648.

It is a happy number.

84675861 is a `hidden beast` number, since 8 + 4 + 67 + 586 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 9090225 = 8694^2 + 3015^2 .

It is not a de Polignac number, because 84675861 - 2²⁵ = 51121429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84675361) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29370 + ... + 32123.

Almost surely, 2^84675861 is an apocalyptic number.

84675861 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84675861 is a deficient number, since it is larger than the sum of its proper divisors (49258071).

84675861 is a wasteful number, since it uses less digits than its factorization.

84675861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61522 (or 61513 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 84675861 is about 9201.9487609962. The cubic root of 84675861 is about 439.1233596002.

The spelling of 84675861 in words is "eighty-four million, six hundred seventy-five thousand, eight hundred sixty-one".