83681745 has 16 divisors (see below), whose sum is σ = 153018240. Its totient is φ = 38254464.

The previous prime is 83681743. The next prime is 83681783. The reversal of 83681745 is 54718638.

It is not a de Polignac number, because 83681745 - 2¹ = 83681743 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83681697 and 83681706.

It is not an unprimeable number, because it can be changed into a prime (83681743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398380 + ... + 398589.

It is an arithmetic number, because the mean of its divisors is an integer number (9563640).

Almost surely, 2^83681745 is an apocalyptic number.

It is an amenable number.

83681745 is a deficient number, since it is larger than the sum of its proper divisors (69336495).

83681745 is a wasteful number, since it uses less digits than its factorization.

83681745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796984.

The product of its digits is 161280, while the sum is 42.

The square root of 83681745 is about 9147.7726797292. The cubic root of 83681745 is about 437.3981172283.

The spelling of 83681745 in words is "eighty-three million, six hundred eighty-one thousand, seven hundred forty-five".