868493405 has 8 divisors (see below), whose sum is σ = 1122360792. Its totient is φ = 641348928.

The previous prime is 868493369. The next prime is 868493429. The reversal of 868493405 is 504394868.

It can be written as a sum of positive squares in 4 ways, for example, as 162741049 + 705752356 = 12757^2 + 26566^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 868493405 - 2⁸ = 868493149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 868493405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6680654 + ... + 6680783.

It is an arithmetic number, because the mean of its divisors is an integer number (140295099).

Almost surely, 2^868493405 is an apocalyptic number.

It is an amenable number.

868493405 is a deficient number, since it is larger than the sum of its proper divisors (253867387).

868493405 is a wasteful number, since it uses less digits than its factorization.

868493405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13361455.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 868493405 is about 29470.2121641498. The cubic root of 868493405 is about 954.0888965004.

The spelling of 868493405 in words is "eight hundred sixty-eight million, four hundred ninety-three thousand, four hundred five".