53499689 has 2 divisors, whose sum is σ = 53499690. Its totient is φ = 53499688.

The previous prime is 53499661. The next prime is 53499703. The reversal of 53499689 is 98699435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 6165289 = 6880^2 + 2483^2 .

It is a cyclic number.

It is not a de Polignac number, because 53499689 - 2¹² = 53495593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 53499689.

It is not a weakly prime, because it can be changed into another prime (53499389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26749844 + 26749845.

It is an arithmetic number, because the mean of its divisors is an integer number (26749845).

Almost surely, 2^53499689 is an apocalyptic number.

It is an amenable number.

53499689 is a deficient number, since it is larger than the sum of its proper divisors (1).

53499689 is an equidigital number, since it uses as much as digits as its factorization.

53499689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 53.

The square root of 53499689 is about 7314.3481596107. The cubic root of 53499689 is about 376.8053720330.

The spelling of 53499689 in words is "fifty-three million, four hundred ninety-nine thousand, six hundred eighty-nine".