84783681 has 24 divisors (see below), whose sum is σ = 134521920. Its totient is φ = 51217056.

The previous prime is 84783679. The next prime is 84783691. The reversal of 84783681 is 18638748.

It is not a de Polignac number, because 84783681 - 2¹ = 84783679 is a prime.

It is a super-2 number, since 2×84783681² = 14376545127819522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84783691) 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 23 ways as a sum of consecutive naturals, for example, 6846 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (5605080).

Almost surely, 2^84783681 is an apocalyptic number.

It is an amenable number.

84783681 is a deficient number, since it is larger than the sum of its proper divisors (49738239).

84783681 is a wasteful number, since it uses less digits than its factorization.

84783681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21605 (or 21602 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 84783681 is about 9207.8054388654. The cubic root of 84783681 is about 439.3096629872.

It can be divided in two parts, 847 and 83681, that multiplied together give a palindrome (70877807).

The spelling of 84783681 in words is "eighty-four million, seven hundred eighty-three thousand, six hundred eighty-one".