68685053 has 4 divisors (see below), whose sum is σ = 68708028. Its totient is φ = 68662080.

The previous prime is 68685047. The next prime is 68685091. The reversal of 68685053 is 35058686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36445369 + 32239684 = 6037^2 + 5678^2 .

It is a cyclic number.

It is not a de Polignac number, because 68685053 - 2⁴ = 68685037 is a prime.

It is a super-2 number, since 2×68685053² = 9435273011225618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68685053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68685013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6188 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (17177007).

Almost surely, 2^68685053 is an apocalyptic number.

It is an amenable number.

68685053 is a deficient number, since it is larger than the sum of its proper divisors (22975).

68685053 is a wasteful number, since it uses less digits than its factorization.

68685053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22974.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 68685053 is about 8287.6445990402. The cubic root of 68685053 is about 409.5315947581.

The spelling of 68685053 in words is "sixty-eight million, six hundred eighty-five thousand, fifty-three".