7375387321 has 4 divisors (see below), whose sum is σ = 7809233652. Its totient is φ = 6941540992.

The previous prime is 7375387309. The next prime is 7375387333. The reversal of 7375387321 is 1237835737.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7375387309) and next prime (7375387333).

It can be written as a sum of positive squares in 2 ways, for example, as 3253105296 + 4122282025 = 57036^2 + 64205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7375387321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7375327321) 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, 216923140 + ... + 216923173.

It is an arithmetic number, because the mean of its divisors is an integer number (1952308413).

Almost surely, 2^7375387321 is an apocalyptic number.

It is an amenable number.

7375387321 is a deficient number, since it is larger than the sum of its proper divisors (433846331).

7375387321 is a wasteful number, since it uses less digits than its factorization.

7375387321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433846330.

The product of its digits is 740880, while the sum is 46.

The square root of 7375387321 is about 85880.0752270281. The cubic root of 7375387321 is about 1946.5322828037.

The spelling of 7375387321 in words is "seven billion, three hundred seventy-five million, three hundred eighty-seven thousand, three hundred twenty-one".