1253213993 has 2 divisors, whose sum is σ = 1253213994. Its totient is φ = 1253213992.

The previous prime is 1253213981. The next prime is 1253214031. The reversal of 1253213993 is 3993123521.

It is an a-pointer prime, because the next prime (1253214031) can be obtained adding 1253213993 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1207354009 + 45859984 = 34747^2 + 6772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253213993 - 2¹² = 1253209897 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253213963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626606996 + 626606997.

It is an arithmetic number, because the mean of its divisors is an integer number (626606997).

Almost surely, 2^1253213993 is an apocalyptic number.

It is an amenable number.

1253213993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253213993 is an equidigital number, since it uses as much as digits as its factorization.

1253213993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 1253213993 is about 35400.7626047801. The cubic root of 1253213993 is about 1078.1397999318.

The spelling of 1253213993 in words is "one billion, two hundred fifty-three million, two hundred thirteen thousand, nine hundred ninety-three".