1253769263 has 4 divisors (see below), whose sum is σ = 1269639840. Its totient is φ = 1237898688.

The previous prime is 1253769259. The next prime is 1253769277. The reversal of 1253769263 is 3629673521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3629673521 = 12809 ⋅283369.

It is a cyclic number.

It is not a de Polignac number, because 1253769263 - 2² = 1253769259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253769203) 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, 7935170 + ... + 7935327.

It is an arithmetic number, because the mean of its divisors is an integer number (317409960).

Almost surely, 2^1253769263 is an apocalyptic number.

1253769263 is a deficient number, since it is larger than the sum of its proper divisors (15870577).

1253769263 is an equidigital number, since it uses as much as digits as its factorization.

1253769263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870576.

The product of its digits is 408240, while the sum is 44.

The square root of 1253769263 is about 35408.6043639113. The cubic root of 1253769263 is about 1078.2990093179.

The spelling of 1253769263 in words is "one billion, two hundred fifty-three million, seven hundred sixty-nine thousand, two hundred sixty-three".