1253940353 has 4 divisors (see below), whose sum is σ = 1255361328. Its totient is φ = 1252519380.

The previous prime is 1253940341. The next prime is 1253940371. The reversal of 1253940353 is 3530493521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3530493521 = 173 ⋅20407477.

It is a cyclic number.

It is not a de Polignac number, because 1253940353 - 2²² = 1249746049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253942353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709163 + ... + 710928.

It is an arithmetic number, because the mean of its divisors is an integer number (313840332).

Almost surely, 2^1253940353 is an apocalyptic number.

It is an amenable number.

1253940353 is a deficient number, since it is larger than the sum of its proper divisors (1420975).

1253940353 is an equidigital number, since it uses as much as digits as its factorization.

1253940353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420974.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 1253940353 is about 35411.0202197000. The cubic root of 1253940353 is about 1078.3480554999.

The spelling of 1253940353 in words is "one billion, two hundred fifty-three million, nine hundred forty thousand, three hundred fifty-three".