1209990253 has 2 divisors, whose sum is σ = 1209990254. Its totient is φ = 1209990252.

The previous prime is 1209990211. The next prime is 1209990259. The reversal of 1209990253 is 3520999021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161241929 + 48748324 = 34077^2 + 6982^2 .

It is an emirp because it is prime and its reverse (3520999021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1209990253 - 2¹³ = 1209982061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1209990259) 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, 604995126 + 604995127.

It is an arithmetic number, because the mean of its divisors is an integer number (604995127).

Almost surely, 2^1209990253 is an apocalyptic number.

It is an amenable number.

1209990253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209990253 is an equidigital number, since it uses as much as digits as its factorization.

1209990253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 1209990253 is about 34784.9141582957. The cubic root of 1209990253 is about 1065.5993754848.

The spelling of 1209990253 in words is "one billion, two hundred nine million, nine hundred ninety thousand, two hundred fifty-three".