858740447 has 2 divisors, whose sum is σ = 858740448. Its totient is φ = 858740446.

The previous prime is 858740423. The next prime is 858740461. The reversal of 858740447 is 744047858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 858740447 - 2⁶ = 858740383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858740647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429370223 + 429370224.

It is an arithmetic number, because the mean of its divisors is an integer number (429370224).

Almost surely, 2^858740447 is an apocalyptic number.

858740447 is a deficient number, since it is larger than the sum of its proper divisors (1).

858740447 is an equidigital number, since it uses as much as digits as its factorization.

858740447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1003520, while the sum is 47.

The square root of 858740447 is about 29304.2735279345. The cubic root of 858740447 is about 950.5040527331.

The spelling of 858740447 in words is "eight hundred fifty-eight million, seven hundred forty thousand, four hundred forty-seven".