1047648461209 has 9 divisors (see below), whose sum is σ = 1218701442591. Its totient is φ = 897978254040.

The previous prime is 1047648461179. The next prime is 1047648461227. The reversal of 1047648461209 is 9021648467401.

It is a happy number.

The square root of 1047648461209 is 1023547.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 708295609609 + 339352851600 = 841603^2 + 582540^2 .

It is not a de Polignac number, because 1047648461209 - 2²³ = 1047640072601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1047648461239) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7091719 + ... + 7237939.

It is an arithmetic number, because the mean of its divisors is an integer number (135411271399).

Almost surely, 2^{1047648461209} is an apocalyptic number.

1047648461209 is the 1023547-th square number.

1047648461209 is the 511774-th centered octagonal number.

It is an amenable number.

1047648461209 is a deficient number, since it is larger than the sum of its proper divisors (171052981382).

1047648461209 is an frugal number, since it uses more digits than its factorization.

1047648461209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292456 (or 146228 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 1047648461209 in words is "one trillion, forty-seven billion, six hundred forty-eight million, four hundred sixty-one thousand, two hundred nine".