84961579 has 2 divisors, whose sum is σ = 84961580. Its totient is φ = 84961578.

The previous prime is 84961537. The next prime is 84961627. The reversal of 84961579 is 97516948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84961579 - 2⁷ = 84961451 is a prime.

It is not a weakly prime, because it can be changed into another prime (84461579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42480789 + 42480790.

It is an arithmetic number, because the mean of its divisors is an integer number (42480790).

Almost surely, 2^84961579 is an apocalyptic number.

84961579 is a deficient number, since it is larger than the sum of its proper divisors (1).

84961579 is an equidigital number, since it uses as much as digits as its factorization.

84961579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 84961579 is about 9217.4605504987. The cubic root of 84961579 is about 439.6167099405.

The spelling of 84961579 in words is "eighty-four million, nine hundred sixty-one thousand, five hundred seventy-nine".