84462921 has 6 divisors (see below), whose sum is σ = 122002010. Its totient is φ = 56308608.

The previous prime is 84462913. The next prime is 84463009. The reversal of 84462921 is 12926448.

84462921 is a `hidden beast` number, since 8 + 4 + 4 + 629 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 14907321 = 8340^2 + 3861^2 .

It is not a de Polignac number, because 84462921 - 2³ = 84462913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84462121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4692376 + ... + 4692393.

Almost surely, 2^84462921 is an apocalyptic number.

It is an amenable number.

84462921 is a deficient number, since it is larger than the sum of its proper divisors (37539089).

84462921 is a wasteful number, since it uses less digits than its factorization.

84462921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384775 (or 9384772 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 84462921 is about 9190.3711024093. The cubic root of 84462921 is about 438.7549530695.

The spelling of 84462921 in words is "eighty-four million, four hundred sixty-two thousand, nine hundred twenty-one".