3817121161 has 4 divisors (see below), whose sum is σ = 4362424192. Its totient is φ = 3271818132.

The previous prime is 3817121159. The next prime is 3817121167. The reversal of 3817121161 is 1611217183.

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 3817121161 - 2¹ = 3817121159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3817121167) 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, 272651505 + ... + 272651518.

It is an arithmetic number, because the mean of its divisors is an integer number (1090606048).

Almost surely, 2^3817121161 is an apocalyptic number.

It is an amenable number.

3817121161 is a deficient number, since it is larger than the sum of its proper divisors (545303031).

3817121161 is an equidigital number, since it uses as much as digits as its factorization.

3817121161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545303030.

The product of its digits is 2016, while the sum is 31.

The square root of 3817121161 is about 61782.8549113749. The cubic root of 3817121161 is about 1562.8308724452.

The spelling of 3817121161 in words is "three billion, eight hundred seventeen million, one hundred twenty-one thousand, one hundred sixty-one".