653509939 has 2 divisors, whose sum is σ = 653509940. Its totient is φ = 653509938.

The previous prime is 653509933. The next prime is 653509957. The reversal of 653509939 is 939905356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653509939 - 2³ = 653509931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 653509892 and 653509901.

It is not a weakly prime, because it can be changed into another prime (653509931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326754969 + 326754970.

It is an arithmetic number, because the mean of its divisors is an integer number (326754970).

Almost surely, 2^653509939 is an apocalyptic number.

653509939 is a deficient number, since it is larger than the sum of its proper divisors (1).

653509939 is an equidigital number, since it uses as much as digits as its factorization.

653509939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 984150, while the sum is 49.

The square root of 653509939 is about 25563.8404587417. The cubic root of 653509939 is about 867.7955105048.

The spelling of 653509939 in words is "six hundred fifty-three million, five hundred nine thousand, nine hundred thirty-nine".