855875407 has 2 divisors, whose sum is σ = 855875408. Its totient is φ = 855875406.

The previous prime is 855875389. The next prime is 855875411. The reversal of 855875407 is 704578558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855875407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855875437) 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 as a sum of consecutive naturals, namely, 427937703 + 427937704.

It is an arithmetic number, because the mean of its divisors is an integer number (427937704).

Almost surely, 2^855875407 is an apocalyptic number.

855875407 is a deficient number, since it is larger than the sum of its proper divisors (1).

855875407 is an equidigital number, since it uses as much as digits as its factorization.

855875407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The square root of 855875407 is about 29255.3483486353. The cubic root of 855875407 is about 949.4458104750.

The spelling of 855875407 in words is "eight hundred fifty-five million, eight hundred seventy-five thousand, four hundred seven".