84673891 has 2 divisors, whose sum is σ = 84673892. Its totient is φ = 84673890.

The previous prime is 84673847. The next prime is 84673943. The reversal of 84673891 is 19837648.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84673891 - 2⁷ = 84673763 is a prime.

It is not a weakly prime, because it can be changed into another prime (84673801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42336945 + 42336946.

It is an arithmetic number, because the mean of its divisors is an integer number (42336946).

Almost surely, 2^84673891 is an apocalyptic number.

84673891 is a deficient number, since it is larger than the sum of its proper divisors (1).

84673891 is an equidigital number, since it uses as much as digits as its factorization.

84673891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 84673891 is about 9201.8417178302. The cubic root of 84673891 is about 439.1199541444.

The spelling of 84673891 in words is "eighty-four million, six hundred seventy-three thousand, eight hundred ninety-one".