53865689 has 2 divisors, whose sum is σ = 53865690. Its totient is φ = 53865688.

The previous prime is 53865667. The next prime is 53865727. The reversal of 53865689 is 98656835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 18344089 = 5960^2 + 4283^2 .

It is a cyclic number.

It is not a de Polignac number, because 53865689 - 2⁸ = 53865433 is a prime.

It is a super-3 number, since 3×53865689³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (53862689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26932844 + 26932845.

It is an arithmetic number, because the mean of its divisors is an integer number (26932845).

Almost surely, 2^53865689 is an apocalyptic number.

It is an amenable number.

53865689 is a deficient number, since it is larger than the sum of its proper divisors (1).

53865689 is an equidigital number, since it uses as much as digits as its factorization.

53865689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 50.

The square root of 53865689 is about 7339.3248327077. The cubic root of 53865689 is about 377.6626821012.

The spelling of 53865689 in words is "fifty-three million, eight hundred sixty-five thousand, six hundred eighty-nine".