84521965 has 32 divisors (see below), whose sum is σ = 115706880. Its totient is φ = 58713600.

The previous prime is 84521963. The next prime is 84521981. The reversal of 84521965 is 56912548.

It is not a de Polignac number, because 84521965 - 2¹ = 84521963 is a prime.

It is a super-2 number, since 2×84521965² = 14287925134922450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84521963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151467 + ... + 152023.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^84521965 is an apocalyptic number.

It is an amenable number.

84521965 is a deficient number, since it is larger than the sum of its proper divisors (31184915).

84521965 is a wasteful number, since it uses less digits than its factorization.

84521965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its digits is 86400, while the sum is 40.

The square root of 84521965 is about 9193.5828162909. The cubic root of 84521965 is about 438.8571668100.

The spelling of 84521965 in words is "eighty-four million, five hundred twenty-one thousand, nine hundred sixty-five".