859638253 has 4 divisors (see below), whose sum is σ = 862676128. Its totient is φ = 856600380.

The previous prime is 859638239. The next prime is 859638281. The reversal of 859638253 is 352836958.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 859638253 - 2¹³ = 859630061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 859638197 and 859638206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859638203) 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 in 3 ways as a sum of consecutive naturals, for example, 1518513 + ... + 1519078.

It is an arithmetic number, because the mean of its divisors is an integer number (215669032).

Almost surely, 2^859638253 is an apocalyptic number.

It is an amenable number.

859638253 is a deficient number, since it is larger than the sum of its proper divisors (3037875).

859638253 is a wasteful number, since it uses less digits than its factorization.

859638253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037874.

The product of its digits is 1555200, while the sum is 49.

The square root of 859638253 is about 29319.5882133430. The cubic root of 859638253 is about 950.8351853901.

The spelling of 859638253 in words is "eight hundred fifty-nine million, six hundred thirty-eight thousand, two hundred fifty-three".