1211008973 has 4 divisors (see below), whose sum is σ = 1219136700. Its totient is φ = 1202881248.

The previous prime is 1211008963. The next prime is 1211008993. The reversal of 1211008973 is 3798001121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 692900329 + 518108644 = 26323^2 + 22762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211008973 - 2⁸ = 1211008717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211008913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4063640 + ... + 4063937.

It is an arithmetic number, because the mean of its divisors is an integer number (304784175).

Almost surely, 2^1211008973 is an apocalyptic number.

It is an amenable number.

1211008973 is a deficient number, since it is larger than the sum of its proper divisors (8127727).

1211008973 is an equidigital number, since it uses as much as digits as its factorization.

1211008973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127726.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 1211008973 is about 34799.5542069148. The cubic root of 1211008973 is about 1065.8983428762.

The spelling of 1211008973 in words is "one billion, two hundred eleven million, eight thousand, nine hundred seventy-three".