9959947 has 2 divisors, whose sum is σ = 9959948. Its totient is φ = 9959946.

The previous prime is 9959927. The next prime is 9959981. The reversal of 9959947 is 7499599.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9959947 - 2¹⁵ = 9927179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9959894 and 9959903.

It is not a weakly prime, because it can be changed into another prime (9959927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979973 + 4979974.

It is an arithmetic number, because the mean of its divisors is an integer number (4979974).

Almost surely, 2^9959947 is an apocalyptic number.

9959947 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959947 is an equidigital number, since it uses as much as digits as its factorization.

9959947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 52.

The square root of 9959947 is about 3155.9383707544. The cubic root of 9959947 is about 215.1554455446.

The spelling of 9959947 in words is "nine million, nine hundred fifty-nine thousand, nine hundred forty-seven".