68735381 has 24 divisors (see below), whose sum is σ = 83633592. Its totient is φ = 56073600.

The previous prime is 68735377. The next prime is 68735399. The reversal of 68735381 is 18353786.

It can be written as a sum of positive squares in 4 ways, for example, as 26615281 + 42120100 = 5159^2 + 6490^2 .

It is not a de Polignac number, because 68735381 - 2² = 68735377 is a prime.

It is a super-2 number, since 2×68735381² = 9449105202430322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68735081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57611 + ... + 58791.

It is an arithmetic number, because the mean of its divisors is an integer number (3484733).

Almost surely, 2^68735381 is an apocalyptic number.

It is an amenable number.

68735381 is a deficient number, since it is larger than the sum of its proper divisors (14898211).

68735381 is a wasteful number, since it uses less digits than its factorization.

68735381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1242 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 68735381 is about 8290.6803701506. The cubic root of 68735381 is about 409.6315964961.

The spelling of 68735381 in words is "sixty-eight million, seven hundred thirty-five thousand, three hundred eighty-one".