68533931 has 12 divisors (see below), whose sum is σ = 74731800. Its totient is φ = 62673408.

The previous prime is 68533897. The next prime is 68533939. The reversal of 68533931 is 13933586.

It is not a de Polignac number, because 68533931 - 2⁶ = 68533867 is a prime.

It is a super-2 number, since 2×68533931² = 9393799396625522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68533939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13835 + ... + 18123.

It is an arithmetic number, because the mean of its divisors is an integer number (6227650).

Almost surely, 2^68533931 is an apocalyptic number.

68533931 is a deficient number, since it is larger than the sum of its proper divisors (6197869).

68533931 is a wasteful number, since it uses less digits than its factorization.

68533931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366 (or 4337 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 68533931 is about 8278.5222715168. The cubic root of 68533931 is about 409.2310214580.

The spelling of 68533931 in words is "sixty-eight million, five hundred thirty-three thousand, nine hundred thirty-one".