84400161 has 4 divisors (see below), whose sum is σ = 112533552. Its totient is φ = 56266772.

The previous prime is 84400159. The next prime is 84400177. The reversal of 84400161 is 16100448.

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 84400161 - 2¹ = 84400159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84400061) 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 3 ways as a sum of consecutive naturals, for example, 14066691 + ... + 14066696.

It is an arithmetic number, because the mean of its divisors is an integer number (28133388).

Almost surely, 2^84400161 is an apocalyptic number.

It is an amenable number.

84400161 is a deficient number, since it is larger than the sum of its proper divisors (28133391).

84400161 is a wasteful number, since it uses less digits than its factorization.

84400161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28133390.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 84400161 is about 9186.9560247124. The cubic root of 84400161 is about 438.6462541532.

The spelling of 84400161 in words is "eighty-four million, four hundred thousand, one hundred sixty-one".