7975503421 has 4 divisors (see below), whose sum is σ = 7980107292. Its totient is φ = 7970899552.

The previous prime is 7975503413. The next prime is 7975503443. The reversal of 7975503421 is 1243055797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1243055797 = 29 ⋅42863993.

It can be written as a sum of positive squares in 2 ways, for example, as 4975750521 + 2999752900 = 70539^2 + 54770^2 .

It is a cyclic number.

It is not a de Polignac number, because 7975503421 - 2³ = 7975503413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7975503401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2299336 + ... + 2302801.

It is an arithmetic number, because the mean of its divisors is an integer number (1995026823).

Almost surely, 2^7975503421 is an apocalyptic number.

It is an amenable number.

7975503421 is a deficient number, since it is larger than the sum of its proper divisors (4603871).

7975503421 is a wasteful number, since it uses less digits than its factorization.

7975503421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4603870.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 7975503421 is about 89305.6740694565. The cubic root of 7975503421 is about 1997.9565312455.

The spelling of 7975503421 in words is "seven billion, nine hundred seventy-five million, five hundred three thousand, four hundred twenty-one".