53501993 has 2 divisors, whose sum is σ = 53501994. Its totient is φ = 53501992.

The previous prime is 53501983. The next prime is 53502041. The reversal of 53501993 is 39910535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34951744 + 18550249 = 5912^2 + 4307^2 .

It is a cyclic number.

It is not a de Polignac number, because 53501993 - 2⁴ = 53501977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53501923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26750996 + 26750997.

It is an arithmetic number, because the mean of its divisors is an integer number (26750997).

Almost surely, 2^53501993 is an apocalyptic number.

It is an amenable number.

53501993 is a deficient number, since it is larger than the sum of its proper divisors (1).

53501993 is an equidigital number, since it uses as much as digits as its factorization.

53501993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 53501993 is about 7314.5056565704. The cubic root of 53501993 is about 376.8107810807.

The spelling of 53501993 in words is "fifty-three million, five hundred one thousand, nine hundred ninety-three".