7389121361 has 8 divisors (see below), whose sum is σ = 7404928104. Its totient is φ = 7373329920.

The previous prime is 7389121321. The next prime is 7389121387. The reversal of 7389121361 is 1631219837.

It can be written as a sum of positive squares in 4 ways, for example, as 208253761 + 7180867600 = 14431^2 + 84740^2 .

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 7389121361 - 2¹⁴ = 7389104977 is a prime.

It is a super-2 number, since 2×7389121361² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7389121321) 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, 1635041 + ... + 1639553.

It is an arithmetic number, because the mean of its divisors is an integer number (925616013).

Almost surely, 2^7389121361 is an apocalyptic number.

It is an amenable number.

7389121361 is a deficient number, since it is larger than the sum of its proper divisors (15806743).

7389121361 is a wasteful number, since it uses less digits than its factorization.

7389121361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7651.

The product of its digits is 54432, while the sum is 41.

The square root of 7389121361 is about 85959.9986098185. The cubic root of 7389121361 is about 1947.7397753360.

The spelling of 7389121361 in words is "seven billion, three hundred eighty-nine million, one hundred twenty-one thousand, three hundred sixty-one".