652639 has 8 divisors (see below), whose sum is σ = 715232. Its totient is φ = 591840.

The previous prime is 652627. The next prime is 652651. The reversal of 652639 is 936256.

It is an interprime number because it is at equal distance from previous prime (652627) and next prime (652651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 652639 - 2⁵ = 652607 is a prime.

It is a Duffinian number.

652639 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 652639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (89404).

2⁶⁵²⁶³⁹ is an apocalyptic number.

652639 is a deficient number, since it is larger than the sum of its proper divisors (62593).

652639 is a wasteful number, since it uses less digits than its factorization.

652639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its digits is 9720, while the sum is 31.

The square root of 652639 is about 807.8607553285. The cubic root of 652639 is about 86.7409832639.

It can be divided in two parts, 65 and 2639, that added together give a square (2704 = 52²).

The spelling of 652639 in words is "six hundred fifty-two thousand, six hundred thirty-nine".