1101999947 has 2 divisors, whose sum is σ = 1101999948. Its totient is φ = 1101999946.

The previous prime is 1101999937. The next prime is 1101999967. The reversal of 1101999947 is 7499991011.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1101999947 - 2⁶ = 1101999883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101999895 and 1101999904.

It is not a weakly prime, because it can be changed into another prime (1101999907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550999973 + 550999974.

It is an arithmetic number, because the mean of its divisors is an integer number (550999974).

Almost surely, 2^1101999947 is an apocalyptic number.

1101999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101999947 is an equidigital number, since it uses as much as digits as its factorization.

1101999947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 50.

The square root of 1101999947 is about 33196.3845471160. The cubic root of 1101999947 is about 1032.9053444261.

The spelling of 1101999947 in words is "one billion, one hundred one million, nine hundred ninety-nine thousand, nine hundred forty-seven".