9903947 has 2 divisors, whose sum is σ = 9903948. Its totient is φ = 9903946.

The previous prime is 9903937. The next prime is 9903953. The reversal of 9903947 is 7493099.

It is a strong prime.

It is an emirp because it is prime and its reverse (7493099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9903947 - 2⁴ = 9903931 is a prime.

It is a d-powerful number, because it can be written as 9 + 9⁵ + 0 + 3¹⁴ + 9⁷ + 4⁹ + 7⁵ .

It is not a weakly prime, because it can be changed into another prime (9903937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4951973 + 4951974.

It is an arithmetic number, because the mean of its divisors is an integer number (4951974).

Almost surely, 2^9903947 is an apocalyptic number.

9903947 is a deficient number, since it is larger than the sum of its proper divisors (1).

9903947 is an equidigital number, since it uses as much as digits as its factorization.

9903947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 9903947 is about 3147.0537014802. The cubic root of 9903947 is about 214.7514488463.

The spelling of 9903947 in words is "nine million, nine hundred three thousand, nine hundred forty-seven".