83964647 has 16 divisors (see below), whose sum is σ = 94429440. Its totient is φ = 74131200.

The previous prime is 83964623. The next prime is 83964677. The reversal of 83964647 is 74646938.

It is not a de Polignac number, because 83964647 - 2⁶ = 83964583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83964677) 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, 34697 + ... + 37037.

It is an arithmetic number, because the mean of its divisors is an integer number (5901840).

Almost surely, 2^83964647 is an apocalyptic number.

83964647 is a deficient number, since it is larger than the sum of its proper divisors (10464793).

83964647 is a wasteful number, since it uses less digits than its factorization.

83964647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474.

The product of its digits is 870912, while the sum is 47.

The square root of 83964647 is about 9163.2225226718. Note that the first 3 decimals coincide. The cubic root of 83964647 is about 437.8904652324.

The spelling of 83964647 in words is "eighty-three million, nine hundred sixty-four thousand, six hundred forty-seven".