8400391847 has 2 divisors, whose sum is σ = 8400391848. Its totient is φ = 8400391846.

The previous prime is 8400391843. The next prime is 8400391877. The reversal of 8400391847 is 7481930048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8400391847 - 2² = 8400391843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8400391798 and 8400391807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8400391843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200195923 + 4200195924.

It is an arithmetic number, because the mean of its divisors is an integer number (4200195924).

Almost surely, 2^8400391847 is an apocalyptic number.

8400391847 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400391847 is an equidigital number, since it uses as much as digits as its factorization.

8400391847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 8400391847 is about 91653.6515748282. The cubic root of 8400391847 is about 2032.8243220163.

The spelling of 8400391847 in words is "eight billion, four hundred million, three hundred ninety-one thousand, eight hundred forty-seven".