864988417 has 4 divisors (see below), whose sum is σ = 865573956. Its totient is φ = 864402880.

The previous prime is 864988379. The next prime is 864988427. The reversal of 864988417 is 714889468.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 698862096 + 166126321 = 26436^2 + 12889^2 .

It is a cyclic number.

It is not a de Polignac number, because 864988417 - 2¹⁵ = 864955649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864988427) 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, 290548 + ... + 293509.

It is an arithmetic number, because the mean of its divisors is an integer number (216393489).

Almost surely, 2^864988417 is an apocalyptic number.

It is an amenable number.

864988417 is a deficient number, since it is larger than the sum of its proper divisors (585539).

864988417 is a wasteful number, since it uses less digits than its factorization.

864988417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585538.

The product of its digits is 3096576, while the sum is 55.

The square root of 864988417 is about 29410.6854221387. The cubic root of 864988417 is about 952.8036904975.

The spelling of 864988417 in words is "eight hundred sixty-four million, nine hundred eighty-eight thousand, four hundred seventeen".