6400400927 has 2 divisors, whose sum is σ = 6400400928. Its totient is φ = 6400400926.

The previous prime is 6400400843. The next prime is 6400400953. The reversal of 6400400927 is 7290040046.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6400400927 - 2¹⁸ = 6400138783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6400400893 and 6400400902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6400400977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200200463 + 3200200464.

It is an arithmetic number, because the mean of its divisors is an integer number (3200200464).

Almost surely, 2^6400400927 is an apocalyptic number.

6400400927 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400400927 is an equidigital number, since it uses as much as digits as its factorization.

6400400927 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6400400927 is about 80002.5057545075. The cubic root of 6400400927 is about 1856.6743021832.

The spelling of 6400400927 in words is "six billion, four hundred million, four hundred thousand, nine hundred twenty-seven".