1253697793 has 4 divisors (see below), whose sum is σ = 1327444740. Its totient is φ = 1179950848.

The previous prime is 1253697763. The next prime is 1253697821. The reversal of 1253697793 is 3977963521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 784672144 + 469025649 = 28012^2 + 21657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253697793 - 2¹³ = 1253689601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253697793.

It is not an unprimeable number, because it can be changed into a prime (1253697733) 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, 36873448 + ... + 36873481.

It is an arithmetic number, because the mean of its divisors is an integer number (331861185).

Almost surely, 2^1253697793 is an apocalyptic number.

It is an amenable number.

1253697793 is a deficient number, since it is larger than the sum of its proper divisors (73746947).

1253697793 is an equidigital number, since it uses as much as digits as its factorization.

1253697793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73746946.

The product of its digits is 2143260, while the sum is 52.

The square root of 1253697793 is about 35407.5951315533. The cubic root of 1253697793 is about 1078.2785197704.

The spelling of 1253697793 in words is "one billion, two hundred fifty-three million, six hundred ninety-seven thousand, seven hundred ninety-three".