9161381 has 8 divisors (see below), whose sum is σ = 9398784. Its totient is φ = 8925840.

The previous prime is 9161377. The next prime is 9161387. The reversal of 9161381 is 1831619.

It is a happy number.

9161381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9161381 - 2² = 9161377 is a prime.

It is a super-2 number, since 2×9161381² = 167861803654322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9161387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19556 + ... + 20018.

It is an arithmetic number, because the mean of its divisors is an integer number (1174848).

Almost surely, 2^9161381 is an apocalyptic number.

It is an amenable number.

9161381 is a deficient number, since it is larger than the sum of its proper divisors (237403).

9161381 is a wasteful number, since it uses less digits than its factorization.

9161381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 1296, while the sum is 29.

The square root of 9161381 is about 3026.7773291076. Note that the first 3 decimals coincide. The cubic root of 9161381 is about 209.2443057830.

The spelling of 9161381 in words is "nine million, one hundred sixty-one thousand, three hundred eighty-one".