1011998947 has 2 divisors, whose sum is σ = 1011998948. Its totient is φ = 1011998946.

The previous prime is 1011998929. The next prime is 1011998987. The reversal of 1011998947 is 7498991101.

1011998947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011998947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011998947.

It is not a weakly prime, because it can be changed into another prime (1011998987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505999473 + 505999474.

It is an arithmetic number, because the mean of its divisors is an integer number (505999474).

Almost surely, 2^1011998947 is an apocalyptic number.

1011998947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011998947 is an equidigital number, since it uses as much as digits as its factorization.

1011998947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 49.

The square root of 1011998947 is about 31811.9308907837. The cubic root of 1011998947 is about 1003.9837576009.

The spelling of 1011998947 in words is "one billion, eleven million, nine hundred ninety-eight thousand, nine hundred forty-seven".