84521379 has 8 divisors (see below), whose sum is σ = 114821712. Its totient is φ = 55284320.

The previous prime is 84521323. The next prime is 84521387. The reversal of 84521379 is 97312548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84521379 - 2⁹ = 84520867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84521179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265632 + ... + 265949.

It is an arithmetic number, because the mean of its divisors is an integer number (14352714).

Almost surely, 2^84521379 is an apocalyptic number.

84521379 is a deficient number, since it is larger than the sum of its proper divisors (30300333).

84521379 is a wasteful number, since it uses less digits than its factorization.

84521379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531637.

The product of its digits is 60480, while the sum is 39.

The square root of 84521379 is about 9193.5509461796. The cubic root of 84521379 is about 438.8561525928.

The spelling of 84521379 in words is "eighty-four million, five hundred twenty-one thousand, three hundred seventy-nine".