858993407 has 2 divisors, whose sum is σ = 858993408. Its totient is φ = 858993406.

The previous prime is 858993403. The next prime is 858993433. The reversal of 858993407 is 704399858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 858993407 - 2² = 858993403 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858993403) 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, 429496703 + 429496704.

It is an arithmetic number, because the mean of its divisors is an integer number (429496704).

Almost surely, 2^858993407 is an apocalyptic number.

858993407 is a deficient number, since it is larger than the sum of its proper divisors (1).

858993407 is an equidigital number, since it uses as much as digits as its factorization.

858993407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 858993407 is about 29308.5893041613. The cubic root of 858993407 is about 950.5973738683.

The spelling of 858993407 in words is "eight hundred fifty-eight million, nine hundred ninety-three thousand, four hundred seven".