1209246947 has 2 divisors, whose sum is σ = 1209246948. Its totient is φ = 1209246946.

The previous prime is 1209246943. The next prime is 1209247027. The reversal of 1209246947 is 7496429021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1209246947 - 2² = 1209246943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1209246898 and 1209246907.

It is not a weakly prime, because it can be changed into another prime (1209246943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604623473 + 604623474.

It is an arithmetic number, because the mean of its divisors is an integer number (604623474).

Almost surely, 2^1209246947 is an apocalyptic number.

1209246947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209246947 is an equidigital number, since it uses as much as digits as its factorization.

1209246947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1209246947 is about 34774.2282013562. The cubic root of 1209246947 is about 1065.3811289181.

The spelling of 1209246947 in words is "one billion, two hundred nine million, two hundred forty-six thousand, nine hundred forty-seven".