68853581 has 2 divisors, whose sum is σ = 68853582. Its totient is φ = 68853580.

The previous prime is 68853541. The next prime is 68853583. The reversal of 68853581 is 18535886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59428681 + 9424900 = 7709^2 + 3070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68853581 is a prime.

It is a super-2 number, since 2×68853581² = 9481631233047122, which contains 22 as substring.

Together with 68853583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68853583) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34426790 + 34426791.

It is an arithmetic number, because the mean of its divisors is an integer number (34426791).

Almost surely, 2^68853581 is an apocalyptic number.

It is an amenable number.

68853581 is a deficient number, since it is larger than the sum of its proper divisors (1).

68853581 is an equidigital number, since it uses as much as digits as its factorization.

68853581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 68853581 is about 8297.8057943049. The cubic root of 68853581 is about 409.8662681039.

The spelling of 68853581 in words is "sixty-eight million, eight hundred fifty-three thousand, five hundred eighty-one".