84348521 has 12 divisors (see below), whose sum is σ = 90349140. Its totient is φ = 78693120.

The previous prime is 84348491. The next prime is 84348541. The reversal of 84348521 is 12584348.

It can be written as a sum of positive squares in 2 ways, for example, as 28472896 + 55875625 = 5336^2 + 7475^2 .

It is not a de Polignac number, because 84348521 - 2⁶ = 84348457 is a prime.

It is a super-2 number, since 2×84348521² = 14229345989774882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84348541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19745 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (7529095).

Almost surely, 2^84348521 is an apocalyptic number.

It is an amenable number.

84348521 is a deficient number, since it is larger than the sum of its proper divisors (6000619).

84348521 is a wasteful number, since it uses less digits than its factorization.

84348521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3953 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 84348521 is about 9184.1450881397. The cubic root of 84348521 is about 438.5567744111.

The spelling of 84348521 in words is "eighty-four million, three hundred forty-eight thousand, five hundred twenty-one".