7731275997 has 24 divisors (see below), whose sum is σ = 11519464896. Its totient is φ = 4595670144.

The previous prime is 7731275989. The next prime is 7731276001. The reversal of 7731275997 is 7995721377.

It is a happy number.

It is not a de Polignac number, because 7731275997 - 2³ = 7731275989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7731275957) 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 23 ways as a sum of consecutive naturals, for example, 191553 + ... + 228374.

It is an arithmetic number, because the mean of its divisors is an integer number (479977704).

Almost surely, 2^7731275997 is an apocalyptic number.

It is an amenable number.

7731275997 is a deficient number, since it is larger than the sum of its proper divisors (3788188899).

7731275997 is a wasteful number, since it uses less digits than its factorization.

7731275997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419985 (or 419966 counting only the distinct ones).

The product of its digits is 5834430, while the sum is 57.

The square root of 7731275997 is about 87927.6748071959. The cubic root of 7731275997 is about 1977.3508083689.

The spelling of 7731275997 in words is "seven billion, seven hundred thirty-one million, two hundred seventy-five thousand, nine hundred ninety-seven".