868921345 has 16 divisors (see below), whose sum is σ = 1079730000. Its totient is φ = 670501888.

The previous prime is 868921309. The next prime is 868921349. The reversal of 868921345 is 543129868.

It can be written as a sum of positive squares in 8 ways, for example, as 150038001 + 718883344 = 12249^2 + 26812^2 .

It is a cyclic number.

It is not a de Polignac number, because 868921345 - 2¹¹ = 868919297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 868921295 and 868921304.

It is not an unprimeable number, because it can be changed into a prime (868921349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184581 + ... + 189229.

It is an arithmetic number, because the mean of its divisors is an integer number (67483125).

Almost surely, 2^868921345 is an apocalyptic number.

It is an amenable number.

868921345 is a deficient number, since it is larger than the sum of its proper divisors (210808655).

868921345 is a wasteful number, since it uses less digits than its factorization.

868921345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972.

The product of its digits is 414720, while the sum is 46.

The square root of 868921345 is about 29477.4718217150. The cubic root of 868921345 is about 954.2455761627.

The spelling of 868921345 in words is "eight hundred sixty-eight million, nine hundred twenty-one thousand, three hundred forty-five".