1213040273 has 2 divisors, whose sum is σ = 1213040274. Its totient is φ = 1213040272.

The previous prime is 1213040209. The next prime is 1213040303. The reversal of 1213040273 is 3720403121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192182784 + 20857489 = 34528^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213040273 - 2⁶ = 1213040209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213042273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606520136 + 606520137.

It is an arithmetic number, because the mean of its divisors is an integer number (606520137).

Almost surely, 2^1213040273 is an apocalyptic number.

It is an amenable number.

1213040273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213040273 is an equidigital number, since it uses as much as digits as its factorization.

1213040273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 1213040273 is about 34828.7276971181. The cubic root of 1213040273 is about 1066.4939756348.

Adding to 1213040273 its reverse (3720403121), we get a palindrome (4933443394).

The spelling of 1213040273 in words is "one billion, two hundred thirteen million, forty thousand, two hundred seventy-three".