68385131 has 4 divisors (see below), whose sum is σ = 68401992. Its totient is φ = 68368272.

The previous prime is 68385073. The next prime is 68385133. The reversal of 68385131 is 13158386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13158386 = 2 ⋅6579193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68385131 is a prime.

It is a super-2 number, since 2×68385131² = 9353052283774322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 68385091 and 68385100.

It is not an unprimeable number, because it can be changed into a prime (68385133) 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, 1760 + ... + 11826.

It is an arithmetic number, because the mean of its divisors is an integer number (17100498).

Almost surely, 2^68385131 is an apocalyptic number.

68385131 is a deficient number, since it is larger than the sum of its proper divisors (16861).

68385131 is a wasteful number, since it uses less digits than its factorization.

68385131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16860.

The product of its digits is 17280, while the sum is 35.

The square root of 68385131 is about 8269.5302768658. The cubic root of 68385131 is about 408.9346344529.

The spelling of 68385131 in words is "sixty-eight million, three hundred eighty-five thousand, one hundred thirty-one".