84909379 has 2 divisors, whose sum is σ = 84909380. Its totient is φ = 84909378.

The previous prime is 84909371. The next prime is 84909427. The reversal of 84909379 is 97390948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84909379 - 2³ = 84909371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84909371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42454689 + 42454690.

It is an arithmetic number, because the mean of its divisors is an integer number (42454690).

Almost surely, 2^84909379 is an apocalyptic number.

84909379 is a deficient number, since it is larger than the sum of its proper divisors (1).

84909379 is an equidigital number, since it uses as much as digits as its factorization.

84909379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 84909379 is about 9214.6285329361. The cubic root of 84909379 is about 439.5266586732.

The spelling of 84909379 in words is "eighty-four million, nine hundred nine thousand, three hundred seventy-nine".