653997393 has 24 divisors (see below), whose sum is σ = 1080713088. Its totient is φ = 373332672.

The previous prime is 653997391. The next prime is 653997397. The reversal of 653997393 is 393799356.

It is not a de Polignac number, because 653997393 - 2¹ = 653997391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (653997391) 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 in 23 ways as a sum of consecutive naturals, for example, 64380 + ... + 73842.

It is an arithmetic number, because the mean of its divisors is an integer number (45029712).

Almost surely, 2^653997393 is an apocalyptic number.

653997393 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

653997393 is a deficient number, since it is larger than the sum of its proper divisors (426715695).

653997393 is a wasteful number, since it uses less digits than its factorization.

653997393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573 (or 10570 counting only the distinct ones).

The product of its digits is 4133430, while the sum is 54.

The square root of 653997393 is about 25573.3727341546. The cubic root of 653997393 is about 868.0112201860.

The spelling of 653997393 in words is "six hundred fifty-three million, nine hundred ninety-seven thousand, three hundred ninety-three".