84447081 has 6 divisors (see below), whose sum is σ = 121979130. Its totient is φ = 56298048.

The previous prime is 84447071. The next prime is 84447107. The reversal of 84447081 is 18074448.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 10830681 = 8580^2 + 3291^2 .

It is not a de Polignac number, because 84447081 - 2⁵ = 84447049 is a prime.

It is a super-2 number, since 2×84447081² = 14262618978841122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84447031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4691496 + ... + 4691513.

It is an arithmetic number, because the mean of its divisors is an integer number (20329855).

Almost surely, 2^84447081 is an apocalyptic number.

It is an amenable number.

84447081 is a deficient number, since it is larger than the sum of its proper divisors (37532049).

84447081 is a wasteful number, since it uses less digits than its factorization.

84447081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383015 (or 9383012 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 84447081 is about 9189.5092904899. The cubic root of 84447081 is about 438.7275236252.

The spelling of 84447081 in words is "eighty-four million, four hundred forty-seven thousand, eighty-one".