9173646381 has 4 divisors (see below), whose sum is σ = 12231528512. Its totient is φ = 6115764252.

The previous prime is 9173646379. The next prime is 9173646407. The reversal of 9173646381 is 1836463719.

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 not a de Polignac number, because 9173646381 - 2¹ = 9173646379 is a prime.

It is a super-2 number, since 2×9173646381² (a number of 21 digits) contains 22 as substring.

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 9173646381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9173646341) 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, 1528941061 + ... + 1528941066.

It is an arithmetic number, because the mean of its divisors is an integer number (3057882128).

Almost surely, 2^9173646381 is an apocalyptic number.

It is an amenable number.

9173646381 is a deficient number, since it is larger than the sum of its proper divisors (3057882131).

9173646381 is a wasteful number, since it uses less digits than its factorization.

9173646381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057882130.

The product of its digits is 653184, while the sum is 48.

The square root of 9173646381 is about 95779.1542090449. The cubic root of 9173646381 is about 2093.3764384513.

The spelling of 9173646381 in words is "nine billion, one hundred seventy-three million, six hundred forty-six thousand, three hundred eighty-one".