83961647 has 12 divisors (see below), whose sum is σ = 106549416. Its totient is φ = 65424240.

The previous prime is 83961613. The next prime is 83961667. The reversal of 83961647 is 74616938.

It is not a de Polignac number, because 83961647 - 2⁸ = 83961391 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83961598 and 83961607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83961667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77348 + ... + 78425.

It is an arithmetic number, because the mean of its divisors is an integer number (8879118).

Almost surely, 2^83961647 is an apocalyptic number.

83961647 is a deficient number, since it is larger than the sum of its proper divisors (22587769).

83961647 is a wasteful number, since it uses less digits than its factorization.

83961647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155798 (or 155791 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 83961647 is about 9163.0588233406. The cubic root of 83961647 is about 437.8852499936.

The spelling of 83961647 in words is "eighty-three million, nine hundred sixty-one thousand, six hundred forty-seven".