84669921 has 32 divisors (see below), whose sum is σ = 143953920. Its totient is φ = 48181392.

The previous prime is 84669919. The next prime is 84669929. The reversal of 84669921 is 12996648.

It is a happy number.

It is not a de Polignac number, because 84669921 - 2¹ = 84669919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84669929) 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, 52696 + ... + 54278.

It is an arithmetic number, because the mean of its divisors is an integer number (4498560).

Almost surely, 2^84669921 is an apocalyptic number.

It is an amenable number.

84669921 is a deficient number, since it is larger than the sum of its proper divisors (59283999).

84669921 is a wasteful number, since it uses less digits than its factorization.

84669921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1876 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 84669921 is about 9201.6259976159. The cubic root of 84669921 is about 439.1130912124.

The spelling of 84669921 in words is "eighty-four million, six hundred sixty-nine thousand, nine hundred twenty-one".