84874459 has 2 divisors, whose sum is σ = 84874460. Its totient is φ = 84874458.

The previous prime is 84874451. The next prime is 84874477. The reversal of 84874459 is 95447848.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84874459 - 2³ = 84874451 is a prime.

It is not a weakly prime, because it can be changed into another prime (84874451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42437229 + 42437230.

It is an arithmetic number, because the mean of its divisors is an integer number (42437230).

Almost surely, 2^84874459 is an apocalyptic number.

84874459 is a deficient number, since it is larger than the sum of its proper divisors (1).

84874459 is an equidigital number, since it uses as much as digits as its factorization.

84874459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The square root of 84874459 is about 9212.7335248557. The cubic root of 84874459 is about 439.4663968755.

The spelling of 84874459 in words is "eighty-four million, eight hundred seventy-four thousand, four hundred fifty-nine".