7935143621 has 4 divisors (see below), whose sum is σ = 8103976512. Its totient is φ = 7766310732.

The previous prime is 7935143471. The next prime is 7935143651. The reversal of 7935143621 is 1263415397.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1263415397 = 97 ⋅13024901.

It is a cyclic number.

It is not a de Polignac number, because 7935143621 - 2¹⁸ = 7934881477 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 (7935143651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84416375 + ... + 84416468.

It is an arithmetic number, because the mean of its divisors is an integer number (2025994128).

Almost surely, 2^7935143621 is an apocalyptic number.

It is an amenable number.

7935143621 is a deficient number, since it is larger than the sum of its proper divisors (168832891).

7935143621 is a wasteful number, since it uses less digits than its factorization.

7935143621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168832890.

The product of its digits is 136080, while the sum is 41.

The square root of 7935143621 is about 89079.4231065738. The cubic root of 7935143621 is about 1994.5806302294.

The spelling of 7935143621 in words is "seven billion, nine hundred thirty-five million, one hundred forty-three thousand, six hundred twenty-one".