99948647 has 2 divisors, whose sum is σ = 99948648. Its totient is φ = 99948646.

The previous prime is 99948643. The next prime is 99948659. The reversal of 99948647 is 74684999.

It is a weak prime.

It is an emirp because it is prime and its reverse (74684999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99948647 - 2² = 99948643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99948592 and 99948601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99948643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49974323 + 49974324.

It is an arithmetic number, because the mean of its divisors is an integer number (49974324).

Almost surely, 2^99948647 is an apocalyptic number.

99948647 is a deficient number, since it is larger than the sum of its proper divisors (1).

99948647 is an equidigital number, since it uses as much as digits as its factorization.

99948647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 56.

The square root of 99948647 is about 9997.4320202740. The cubic root of 99948647 is about 464.0794165864.

Subtracting from 99948647 its sum of digits (56), we obtain a triangular number (99948591 = T₁₄₁₃₈).

The spelling of 99948647 in words is "ninety-nine million, nine hundred forty-eight thousand, six hundred forty-seven".