84951681 has 8 divisors (see below), whose sum is σ = 115188960. Its totient is φ = 55674432.

The previous prime is 84951637. The next prime is 84951689. The reversal of 84951681 is 18615948.

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

It is not a de Polignac number, because 84951681 - 2⁷ = 84951553 is a prime.

It is a super-2 number, since 2×84951681² = 14433576209451522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84951689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239800 + ... + 240153.

It is an arithmetic number, because the mean of its divisors is an integer number (14398620).

Almost surely, 2^84951681 is an apocalyptic number.

It is an amenable number.

84951681 is a deficient number, since it is larger than the sum of its proper divisors (30237279).

84951681 is a wasteful number, since it uses less digits than its factorization.

84951681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480015.

The product of its digits is 69120, while the sum is 42.

The square root of 84951681 is about 9216.9236190825. The cubic root of 84951681 is about 439.5996375366.

The spelling of 84951681 in words is "eighty-four million, nine hundred fifty-one thousand, six hundred eighty-one".