653632939 has 2 divisors, whose sum is σ = 653632940. Its totient is φ = 653632938.

The previous prime is 653632921. The next prime is 653632979. The reversal of 653632939 is 939236356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 653632939 - 2¹⁷ = 653501867 is a prime.

It is not a weakly prime, because it can be changed into another prime (653632979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326816469 + 326816470.

It is an arithmetic number, because the mean of its divisors is an integer number (326816470).

Almost surely, 2^653632939 is an apocalyptic number.

653632939 is a deficient number, since it is larger than the sum of its proper divisors (1).

653632939 is an equidigital number, since it uses as much as digits as its factorization.

653632939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 46.

The square root of 653632939 is about 25566.2460873707. The cubic root of 653632939 is about 867.8499509683.

The spelling of 653632939 in words is "six hundred fifty-three million, six hundred thirty-two thousand, nine hundred thirty-nine".