84691859 has 4 divisors (see below), whose sum is σ = 96790704. Its totient is φ = 72593016.

The previous prime is 84691847. The next prime is 84691889. The reversal of 84691859 is 95819648.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84691859 - 2²⁰ = 83643283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84691829) 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, 6049412 + ... + 6049425.

It is an arithmetic number, because the mean of its divisors is an integer number (24197676).

Almost surely, 2^84691859 is an apocalyptic number.

84691859 is a deficient number, since it is larger than the sum of its proper divisors (12098845).

84691859 is a wasteful number, since it uses less digits than its factorization.

84691859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12098844.

The product of its digits is 622080, while the sum is 50.

The square root of 84691859 is about 9202.8179923326. The cubic root of 84691859 is about 439.1510127120.

The spelling of 84691859 in words is "eighty-four million, six hundred ninety-one thousand, eight hundred fifty-nine".