7827997287 has 8 divisors (see below), whose sum is σ = 11386177920. Its totient is φ = 4744240760.

The previous prime is 7827997279. The next prime is 7827997297.

7827997287 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7827997287 - 2³ = 7827997279 is a prime.

It is a super-2 number, since 2×7827997287² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7827997237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118605987 + ... + 118606052.

It is an arithmetic number, because the mean of its divisors is an integer number (1423272240).

Almost surely, 2^7827997287 is an apocalyptic number.

7827997287 is a deficient number, since it is larger than the sum of its proper divisors (3558180633).

7827997287 is a wasteful number, since it uses less digits than its factorization.

7827997287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237212053.

The product of its digits is 49787136, while the sum is 66.

The square root of 7827997287 is about 88475.9701105334. The cubic root of 7827997287 is about 1985.5624702331.

The spelling of 7827997287 in words is "seven billion, eight hundred twenty-seven million, nine hundred ninety-seven thousand, two hundred eighty-seven".