868366009 has 4 divisors (see below), whose sum is σ = 992418304. Its totient is φ = 744313716.

The previous prime is 868365991. The next prime is 868366021. The reversal of 868366009 is 900663868.

It is a happy number.

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 868366009 - 2⁵ = 868365977 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 868366009.

It is not an unprimeable number, because it can be changed into a prime (868366039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62026137 + ... + 62026150.

It is an arithmetic number, because the mean of its divisors is an integer number (248104576).

Almost surely, 2^868366009 is an apocalyptic number.

It is an amenable number.

868366009 is a deficient number, since it is larger than the sum of its proper divisors (124052295).

868366009 is a wasteful number, since it uses less digits than its factorization.

868366009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124052294.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 868366009 is about 29468.0506481172. The cubic root of 868366009 is about 954.0422436600.

It can be divided in two parts, 86 and 8366009, that added together give a triangular number (8366095 = T₄₀₉₀).

The spelling of 868366009 in words is "eight hundred sixty-eight million, three hundred sixty-six thousand, nine".