858559949 has 8 divisors (see below), whose sum is σ = 934993080. Its totient is φ = 783611136.

The previous prime is 858559943. The next prime is 858559969. The reversal of 858559949 is 949955858.

It can be written as a sum of positive squares in 4 ways, for example, as 82937449 + 775622500 = 9107^2 + 27850^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-858559949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858559891 and 858559900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858559943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369872 + ... + 372185.

It is an arithmetic number, because the mean of its divisors is an integer number (116874135).

Almost surely, 2^858559949 is an apocalyptic number.

858559949 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

It is an amenable number.

858559949 is a deficient number, since it is larger than the sum of its proper divisors (76433131).

858559949 is a wasteful number, since it uses less digits than its factorization.

858559949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742159.

The product of its digits is 23328000, while the sum is 62.

The square root of 858559949 is about 29301.1936446282. The cubic root of 858559949 is about 950.4374528259.

The spelling of 858559949 in words is "eight hundred fifty-eight million, five hundred fifty-nine thousand, nine hundred forty-nine".