84149579 has 2 divisors, whose sum is σ = 84149580. Its totient is φ = 84149578.

The previous prime is 84149573. The next prime is 84149587. The reversal of 84149579 is 97594148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84149579 - 2¹⁶ = 84084043 is a prime.

It is not a weakly prime, because it can be changed into another prime (84149573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42074789 + 42074790.

It is an arithmetic number, because the mean of its divisors is an integer number (42074790).

Almost surely, 2^84149579 is an apocalyptic number.

84149579 is a deficient number, since it is larger than the sum of its proper divisors (1).

84149579 is an equidigital number, since it uses as much as digits as its factorization.

84149579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 84149579 is about 9173.3079638700. The cubic root of 84149579 is about 438.2117138463.

The spelling of 84149579 in words is "eighty-four million, one hundred forty-nine thousand, five hundred seventy-nine".