68137743 has 16 divisors (see below), whose sum is σ = 97257600. Its totient is φ = 42302880.

The previous prime is 68137739. The next prime is 68137763. The reversal of 68137743 is 34773186.

It is not a de Polignac number, because 68137743 - 2² = 68137739 is a prime.

It is a super-2 number, since 2×68137743² = 9285504042268098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68137763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6768 + ... + 13493.

It is an arithmetic number, because the mean of its divisors is an integer number (6078600).

Almost surely, 2^68137743 is an apocalyptic number.

68137743 is a deficient number, since it is larger than the sum of its proper divisors (29119857).

68137743 is a wasteful number, since it uses less digits than its factorization.

68137743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20342.

The product of its digits is 84672, while the sum is 39.

The square root of 68137743 is about 8254.5589221957. The cubic root of 68137743 is about 408.4409220686.

The spelling of 68137743 in words is "sixty-eight million, one hundred thirty-seven thousand, seven hundred forty-three".