84315379 has 2 divisors, whose sum is σ = 84315380. Its totient is φ = 84315378.

The previous prime is 84315367. The next prime is 84315479. The reversal of 84315379 is 97351348.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84315379 - 2⁵ = 84315347 is a prime.

It is not a weakly prime, because it can be changed into another prime (84315349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42157689 + 42157690.

It is an arithmetic number, because the mean of its divisors is an integer number (42157690).

Almost surely, 2^84315379 is an apocalyptic number.

84315379 is a deficient number, since it is larger than the sum of its proper divisors (1).

84315379 is an equidigital number, since it uses as much as digits as its factorization.

84315379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 84315379 is about 9182.3406057497. The cubic root of 84315379 is about 438.4993280267.

The spelling of 84315379 in words is "eighty-four million, three hundred fifteen thousand, three hundred seventy-nine".