9811117253 has 4 divisors (see below), whose sum is σ = 11212705440. Its totient is φ = 8409529068.

The previous prime is 9811117249. The next prime is 9811117273. The reversal of 9811117253 is 3527111189.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 9811117253 - 2² = 9811117249 is a prime.

It is a super-2 number, since 2×9811117253² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9811117213) 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, 700794083 + ... + 700794096.

It is an arithmetic number, because the mean of its divisors is an integer number (2803176360).

Almost surely, 2^9811117253 is an apocalyptic number.

It is an amenable number.

9811117253 is a deficient number, since it is larger than the sum of its proper divisors (1401588187).

9811117253 is a wasteful number, since it uses less digits than its factorization.

9811117253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401588186.

The product of its digits is 15120, while the sum is 38.

The square root of 9811117253 is about 99051.0840576720. The cubic root of 9811117253 is about 2140.7838608777.

The spelling of 9811117253 in words is "nine billion, eight hundred eleven million, one hundred seventeen thousand, two hundred fifty-three".