652646399 has 4 divisors (see below), whose sum is σ = 664960536. Its totient is φ = 640332264.

The previous prime is 652646387. The next prime is 652646429. The reversal of 652646399 is 993646256.

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 652646399 - 2⁴ = 652646383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652646359) 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, 6156989 + ... + 6157094.

It is an arithmetic number, because the mean of its divisors is an integer number (166240134).

Almost surely, 2^652646399 is an apocalyptic number.

652646399 is a deficient number, since it is larger than the sum of its proper divisors (12314137).

652646399 is a wasteful number, since it uses less digits than its factorization.

652646399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12314136.

The product of its digits is 2099520, while the sum is 50.

The square root of 652646399 is about 25546.9450032680. The cubic root of 652646399 is about 867.4131105825.

It can be divided in two parts, 6526 and 46399, that added together give a palindrome (52925).

The spelling of 652646399 in words is "six hundred fifty-two million, six hundred forty-six thousand, three hundred ninety-nine".