84945081 has 32 divisors (see below), whose sum is σ = 128275840. Its totient is φ = 49678272.

The previous prime is 84945059. The next prime is 84945101. The reversal of 84945081 is 18054948.

It is not a de Polignac number, because 84945081 - 2⁹ = 84944569 is a prime.

It is a super-2 number, since 2×84945081² = 14431333572193122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84945041) 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, 1975446 + ... + 1975488.

It is an arithmetic number, because the mean of its divisors is an integer number (4008620).

Almost surely, 2^84945081 is an apocalyptic number.

It is an amenable number.

84945081 is a deficient number, since it is larger than the sum of its proper divisors (43330759).

84945081 is an equidigital number, since it uses as much as digits as its factorization.

84945081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 84945081 is about 9216.5655750936. The cubic root of 84945081 is about 439.5882528972.

The spelling of 84945081 in words is "eighty-four million, nine hundred forty-five thousand, eighty-one".