53653993 has 2 divisors, whose sum is σ = 53653994. Its totient is φ = 53653992.

The previous prime is 53653991. The next prime is 53654017. The reversal of 53653993 is 39935635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39538944 + 14115049 = 6288^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 53653993 - 2¹ = 53653991 is a prime.

Together with 53653991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53653991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26826996 + 26826997.

It is an arithmetic number, because the mean of its divisors is an integer number (26826997).

Almost surely, 2^53653993 is an apocalyptic number.

It is an amenable number.

53653993 is a deficient number, since it is larger than the sum of its proper divisors (1).

53653993 is an equidigital number, since it uses as much as digits as its factorization.

53653993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 328050, while the sum is 43.

The square root of 53653993 is about 7324.8885998355. Note that the first 3 decimals coincide. The cubic root of 53653993 is about 377.1672854588.

The spelling of 53653993 in words is "fifty-three million, six hundred fifty-three thousand, nine hundred ninety-three".