1209158953 has 2 divisors, whose sum is σ = 1209158954. Its totient is φ = 1209158952.

The previous prime is 1209158941. The next prime is 1209158987. The reversal of 1209158953 is 3598519021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199721769 + 9437184 = 34637^2 + 3072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1209158953 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209158903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604579476 + 604579477.

It is an arithmetic number, because the mean of its divisors is an integer number (604579477).

Almost surely, 2^1209158953 is an apocalyptic number.

It is an amenable number.

1209158953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209158953 is an equidigital number, since it uses as much as digits as its factorization.

1209158953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 1209158953 is about 34772.9629597479. The cubic root of 1209158953 is about 1065.3552865481.

The spelling of 1209158953 in words is "one billion, two hundred nine million, one hundred fifty-eight thousand, nine hundred fifty-three".