7443378121 has 8 divisors (see below), whose sum is σ = 7536971520. Its totient is φ = 7350195072.

The previous prime is 7443378091. The next prime is 7443378127. The reversal of 7443378121 is 1218733447.

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 7443378121 - 2¹⁹ = 7442853833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7443378127) 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, 66001 + ... + 138718.

It is an arithmetic number, because the mean of its divisors is an integer number (942121440).

Almost surely, 2^7443378121 is an apocalyptic number.

It is an amenable number.

7443378121 is a deficient number, since it is larger than the sum of its proper divisors (93593399).

7443378121 is a wasteful number, since it uses less digits than its factorization.

7443378121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205175.

The product of its digits is 112896, while the sum is 40.

The square root of 7443378121 is about 86275.0144653711. The cubic root of 7443378121 is about 1952.4954351401.

The spelling of 7443378121 in words is "seven billion, four hundred forty-three million, three hundred seventy-eight thousand, one hundred twenty-one".