1253533009 has 2 divisors, whose sum is σ = 1253533010. Its totient is φ = 1253533008.

The previous prime is 1253532983. The next prime is 1253533031. The reversal of 1253533009 is 9003353521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681366609 + 572166400 = 26103^2 + 23920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253533009 - 2⁷ = 1253532881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253533109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626766504 + 626766505.

It is an arithmetic number, because the mean of its divisors is an integer number (626766505).

Almost surely, 2^1253533009 is an apocalyptic number.

It is an amenable number.

1253533009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253533009 is an equidigital number, since it uses as much as digits as its factorization.

1253533009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 1253533009 is about 35405.2680967113. The cubic root of 1253533009 is about 1078.2312753084.

The spelling of 1253533009 in words is "one billion, two hundred fifty-three million, five hundred thirty-three thousand, nine".