52640389 has 2 divisors, whose sum is σ = 52640390. Its totient is φ = 52640388.

The previous prime is 52640363. The next prime is 52640417. The reversal of 52640389 is 98304625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43890625 + 8749764 = 6625^2 + 2958^2 .

It is a cyclic number.

It is not a de Polignac number, because 52640389 - 2⁹ = 52639877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52640309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26320194 + 26320195.

It is an arithmetic number, because the mean of its divisors is an integer number (26320195).

Almost surely, 2^52640389 is an apocalyptic number.

It is an amenable number.

52640389 is a deficient number, since it is larger than the sum of its proper divisors (1).

52640389 is an equidigital number, since it uses as much as digits as its factorization.

52640389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 52640389 is about 7255.3696666676. The cubic root of 52640389 is about 374.7770858881. Note that the first 3 decimals are identical.

The spelling of 52640389 in words is "fifty-two million, six hundred forty thousand, three hundred eighty-nine".