652113821 has 2 divisors, whose sum is σ = 652113822. Its totient is φ = 652113820.

The previous prime is 652113817. The next prime is 652113823. The reversal of 652113821 is 128311256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 642064921 + 10048900 = 25339^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 652113821 - 2² = 652113817 is a prime.

Together with 652113823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652113823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326056910 + 326056911.

It is an arithmetic number, because the mean of its divisors is an integer number (326056911).

Almost surely, 2^652113821 is an apocalyptic number.

It is an amenable number.

652113821 is a deficient number, since it is larger than the sum of its proper divisors (1).

652113821 is an equidigital number, since it uses as much as digits as its factorization.

652113821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 652113821 is about 25536.5193595368. The cubic root of 652113821 is about 867.1771017952.

The spelling of 652113821 in words is "six hundred fifty-two million, one hundred thirteen thousand, eight hundred twenty-one".