7921542053 has 4 divisors (see below), whose sum is σ = 7928597088. Its totient is φ = 7914487020.

The previous prime is 7921542017. The next prime is 7921542077. The reversal of 7921542053 is 3502451297.

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.

It is a cyclic number.

It is not a de Polignac number, because 7921542053 - 2¹⁴ = 7921525669 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7921541998 and 7921542016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921542353) 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, 3525833 + ... + 3528078.

It is an arithmetic number, because the mean of its divisors is an integer number (1982149272).

Almost surely, 2^7921542053 is an apocalyptic number.

It is an amenable number.

7921542053 is a deficient number, since it is larger than the sum of its proper divisors (7055035).

7921542053 is a wasteful number, since it uses less digits than its factorization.

7921542053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055034.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 7921542053 is about 89003.0451894765. The cubic root of 7921542053 is about 1993.4403467459.

The spelling of 7921542053 in words is "seven billion, nine hundred twenty-one million, five hundred forty-two thousand, fifty-three".