84345981 has 8 divisors (see below), whose sum is σ = 114305184. Its totient is φ = 55308720.

The previous prime is 84345931. The next prime is 84346001. The reversal of 84345981 is 18954348.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84345981 - 2¹⁰ = 84344957 is a prime.

It is a super-2 number, since 2×84345981² = 14228489021704722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84345901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230271 + ... + 230636.

It is an arithmetic number, because the mean of its divisors is an integer number (14288148).

Almost surely, 2^84345981 is an apocalyptic number.

It is an amenable number.

84345981 is a deficient number, since it is larger than the sum of its proper divisors (29959203).

84345981 is a wasteful number, since it uses less digits than its factorization.

84345981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460971.

The product of its digits is 138240, while the sum is 42.

The square root of 84345981 is about 9184.0068053111. The cubic root of 84345981 is about 438.5523722577.

The spelling of 84345981 in words is "eighty-four million, three hundred forty-five thousand, nine hundred eighty-one".