864719 has 4 divisors (see below), whose sum is σ = 871080. Its totient is φ = 858360.

The previous prime is 864707. The next prime is 864733. The reversal of 864719 is 917468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 864719 - 2¹² = 860623 is a prime.

It is a super-2 number, since 2×864719² = 1495477897922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864119) 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, 2972 + ... + 3249.

It is an arithmetic number, because the mean of its divisors is an integer number (217770).

2⁸⁶⁴⁷¹⁹ is an apocalyptic number.

864719 is a deficient number, since it is larger than the sum of its proper divisors (6361).

864719 is a wasteful number, since it uses less digits than its factorization.

864719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360.

The product of its digits is 12096, while the sum is 35.

The square root of 864719 is about 929.9026830803. The cubic root of 864719 is about 95.2704757316.

The spelling of 864719 in words is "eight hundred sixty-four thousand, seven hundred nineteen".