7925421617 has 4 divisors (see below), whose sum is σ = 7925629296. Its totient is φ = 7925213940.

The previous prime is 7925421613. The next prime is 7925421619. The reversal of 7925421617 is 7161245297.

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 7925421617 - 2² = 7925421613 is a prime.

It is a super-3 number, since 3×7925421617³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7925421613) 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, 28259 + ... + 129032.

It is an arithmetic number, because the mean of its divisors is an integer number (1981407324).

Almost surely, 2^7925421617 is an apocalyptic number.

It is an amenable number.

7925421617 is a deficient number, since it is larger than the sum of its proper divisors (207679).

7925421617 is a wasteful number, since it uses less digits than its factorization.

7925421617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207678.

The product of its digits is 211680, while the sum is 44.

The square root of 7925421617 is about 89024.8370793230. The cubic root of 7925421617 is about 1993.7657218298.

The spelling of 7925421617 in words is "seven billion, nine hundred twenty-five million, four hundred twenty-one thousand, six hundred seventeen".