7678784231 has 2 divisors, whose sum is σ = 7678784232. Its totient is φ = 7678784230.

The previous prime is 7678784171. The next prime is 7678784251. The reversal of 7678784231 is 1324878767.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7678784231 is a prime.

It is a super-2 number, since 2×7678784231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7678784251) 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 as a sum of consecutive naturals, namely, 3839392115 + 3839392116.

It is an arithmetic number, because the mean of its divisors is an integer number (3839392116).

Almost surely, 2^7678784231 is an apocalyptic number.

7678784231 is a deficient number, since it is larger than the sum of its proper divisors (1).

7678784231 is an equidigital number, since it uses as much as digits as its factorization.

7678784231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3161088, while the sum is 53.

The square root of 7678784231 is about 87628.6724251828. The cubic root of 7678784231 is about 1972.8655447971.

The spelling of 7678784231 in words is "seven billion, six hundred seventy-eight million, seven hundred eighty-four thousand, two hundred thirty-one".