99981347 has 2 divisors, whose sum is σ = 99981348. Its totient is φ = 99981346.

The previous prime is 99981317. The next prime is 99981377. The reversal of 99981347 is 74318999.

It is a balanced prime because it is at equal distance from previous prime (99981317) and next prime (99981377).

It is a cyclic number.

It is not a de Polignac number, because 99981347 - 2¹⁰ = 99980323 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99981295 and 99981304.

It is not a weakly prime, because it can be changed into another prime (99981317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49990673 + 49990674.

It is an arithmetic number, because the mean of its divisors is an integer number (49990674).

Almost surely, 2^99981347 is an apocalyptic number.

99981347 is a deficient number, since it is larger than the sum of its proper divisors (1).

99981347 is an equidigital number, since it uses as much as digits as its factorization.

99981347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 50.

The square root of 99981347 is about 9999.0673065041. The cubic root of 99981347 is about 464.1300217145.

The spelling of 99981347 in words is "ninety-nine million, nine hundred eighty-one thousand, three hundred forty-seven".