868371569 has 8 divisors (see below), whose sum is σ = 935502120. Its totient is φ = 801288576.

The previous prime is 868371551. The next prime is 868371571. The reversal of 868371569 is 965173868.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48121969 + 820249600 = 6937^2 + 28640^2 .

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-868371569 is a prime.

It is a super-2 number, since 2×868371569² = 1508138363695043522, which contains 22 as substring.

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 868371569.

It is not an unprimeable number, because it can be changed into a prime (868371599) 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, 32087 + ... + 52595.

It is an arithmetic number, because the mean of its divisors is an integer number (116937765).

Almost surely, 2^868371569 is an apocalyptic number.

It is an amenable number.

868371569 is a deficient number, since it is larger than the sum of its proper divisors (67130551).

868371569 is a wasteful number, since it uses less digits than its factorization.

868371569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23779.

The product of its digits is 2177280, while the sum is 53.

The square root of 868371569 is about 29468.1449874267. The cubic root of 868371569 is about 954.0442798458.

The spelling of 868371569 in words is "eight hundred sixty-eight million, three hundred seventy-one thousand, five hundred sixty-nine".