1253047773 has 4 divisors (see below), whose sum is σ = 1670730368. Its totient is φ = 835365180.

The previous prime is 1253047771. The next prime is 1253047799. The reversal of 1253047773 is 3777403521.

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: 3777403521 = 3 ⋅1259134507.

It is not a de Polignac number, because 1253047773 - 2¹ = 1253047771 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253047771) 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, 208841293 + ... + 208841298.

It is an arithmetic number, because the mean of its divisors is an integer number (417682592).

Almost surely, 2^1253047773 is an apocalyptic number.

It is an amenable number.

1253047773 is a deficient number, since it is larger than the sum of its proper divisors (417682595).

1253047773 is an equidigital number, since it uses as much as digits as its factorization.

1253047773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417682594.

The product of its (nonzero) digits is 123480, while the sum is 39.

The square root of 1253047773 is about 35398.4148373907. The cubic root of 1253047773 is about 1078.0921314777.

The spelling of 1253047773 in words is "one billion, two hundred fifty-three million, forty-seven thousand, seven hundred seventy-three".