84965921 has 4 divisors (see below), whose sum is σ = 85635072. Its totient is φ = 84296772.

The previous prime is 84965917. The next prime is 84965927. The reversal of 84965921 is 12956948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84965921 - 2² = 84965917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84965927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334385 + ... + 334638.

It is an arithmetic number, because the mean of its divisors is an integer number (21408768).

Almost surely, 2^84965921 is an apocalyptic number.

It is an amenable number.

84965921 is a deficient number, since it is larger than the sum of its proper divisors (669151).

84965921 is a wasteful number, since it uses less digits than its factorization.

84965921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669150.

The product of its digits is 155520, while the sum is 44.

The square root of 84965921 is about 9217.6960787390. The cubic root of 84965921 is about 439.6241987500.

The spelling of 84965921 in words is "eighty-four million, nine hundred sixty-five thousand, nine hundred twenty-one".