868629 has 4 divisors (see below), whose sum is σ = 1158176. Its totient is φ = 579084.

The previous prime is 868613. The next prime is 868639. The reversal of 868629 is 926868.

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 not a de Polignac number, because 868629 - 2⁴ = 868613 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 868629.

It is not an unprimeable number, because it can be changed into a prime (868639) 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, 144769 + ... + 144774.

It is an arithmetic number, because the mean of its divisors is an integer number (289544).

2⁸⁶⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

868629 is a deficient number, since it is larger than the sum of its proper divisors (289547).

868629 is a wasteful number, since it uses less digits than its factorization.

868629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289546.

The product of its digits is 41472, while the sum is 39.

The square root of 868629 is about 932.0026823996. The cubic root of 868629 is about 95.4138546830.

The spelling of 868629 in words is "eight hundred sixty-eight thousand, six hundred twenty-nine".