852638407 has 2 divisors, whose sum is σ = 852638408. Its totient is φ = 852638406.

The previous prime is 852638399. The next prime is 852638411. The reversal of 852638407 is 704836258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 852638407 - 2³ = 852638399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (852638447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426319203 + 426319204.

It is an arithmetic number, because the mean of its divisors is an integer number (426319204).

Almost surely, 2^852638407 is an apocalyptic number.

852638407 is a deficient number, since it is larger than the sum of its proper divisors (1).

852638407 is an equidigital number, since it uses as much as digits as its factorization.

852638407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 852638407 is about 29199.9727225900. The cubic root of 852638407 is about 948.2473343115.

The spelling of 852638407 in words is "eight hundred fifty-two million, six hundred thirty-eight thousand, four hundred seven".