653867 has 4 divisors (see below), whose sum is σ = 682320. Its totient is φ = 625416.

The previous prime is 653831. The next prime is 653879. The reversal of 653867 is 768356.

It is a happy number.

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

It is not a de Polignac number, because 653867 - 2¹² = 649771 is a prime.

It is a Duffinian number.

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 653867.

It is not an unprimeable number, because it can be changed into a prime (653267) 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, 14192 + ... + 14237.

It is an arithmetic number, because the mean of its divisors is an integer number (170580).

2⁶⁵³⁸⁶⁷ is an apocalyptic number.

653867 is a deficient number, since it is larger than the sum of its proper divisors (28453).

653867 is a wasteful number, since it uses less digits than its factorization.

653867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28452.

The product of its digits is 30240, while the sum is 35.

The square root of 653867 is about 808.6204301154. The cubic root of 653867 is about 86.7953528768.

The spelling of 653867 in words is "six hundred fifty-three thousand, eight hundred sixty-seven".