9491234172 has 48 divisors (see below), whose sum is σ = 25344372480. Its totient is φ = 2708093952.

The previous prime is 9491234171. The next prime is 9491234189. The reversal of 9491234172 is 2714321949.

It is a happy number.

It is a super-2 number, since 2×9491234172² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9491234171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14373 + ... + 138524.

It is an arithmetic number, because the mean of its divisors is an integer number (528007760).

Almost surely, 2^9491234172 is an apocalyptic number.

It is an amenable number.

9491234172 is an abundant number, since it is smaller than the sum of its proper divisors (15853138308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9491234172 is a wasteful number, since it uses less digits than its factorization.

9491234172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153650 (or 153648 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 9491234172 is about 97422.9653213245. The cubic root of 9491234172 is about 2117.2601793700.

The spelling of 9491234172 in words is "nine billion, four hundred ninety-one million, two hundred thirty-four thousand, one hundred seventy-two".