105998647 has 2 divisors, whose sum is σ = 105998648. Its totient is φ = 105998646.

The previous prime is 105998617. The next prime is 105998687. The reversal of 105998647 is 746899501.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105998647 is a prime.

It is a super-2 number, since 2×105998647² = 22471426331661218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105998647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105998617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52999323 + 52999324.

It is an arithmetic number, because the mean of its divisors is an integer number (52999324).

Almost surely, 2^105998647 is an apocalyptic number.

105998647 is a deficient number, since it is larger than the sum of its proper divisors (1).

105998647 is an equidigital number, since it uses as much as digits as its factorization.

105998647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 105998647 is about 10295.5644332887. The cubic root of 105998647 is about 473.2603355104.

The spelling of 105998647 in words is "one hundred five million, nine hundred ninety-eight thousand, six hundred forty-seven".