7831420925 has 12 divisors (see below), whose sum is σ = 9973421556. Its totient is φ = 6095808000.

The previous prime is 7831420871. The next prime is 7831420943. The reversal of 7831420925 is 5290241387.

It can be written as a sum of positive squares in 6 ways, for example, as 4656964 + 7826763961 = 2158^2 + 88469^2 .

It is not a de Polignac number, because 7831420925 - 2²⁴ = 7814643709 is a prime.

It is a super-2 number, since 2×7831420925² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4232276 + ... + 4234125.

It is an arithmetic number, because the mean of its divisors is an integer number (831118463).

Almost surely, 2^7831420925 is an apocalyptic number.

It is an amenable number.

7831420925 is a deficient number, since it is larger than the sum of its proper divisors (2142000631).

7831420925 is a wasteful number, since it uses less digits than its factorization.

7831420925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8466448 (or 8466443 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 7831420925 is about 88495.3158364893. The cubic root of 7831420925 is about 1985.8518953178.

The spelling of 7831420925 in words is "seven billion, eight hundred thirty-one million, four hundred twenty thousand, nine hundred twenty-five".