68691938 has 16 divisors (see below), whose sum is σ = 122878080. Its totient is φ = 28159296.

The previous prime is 68691929. The next prime is 68691947. The reversal of 68691938 is 83919686.

It is an interprime number because it is at equal distance from previous prime (68691929) and next prime (68691947).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 106343 + ... + 106986.

It is an arithmetic number, because the mean of its divisors is an integer number (7679880).

Almost surely, 2^68691938 is an apocalyptic number.

68691938 is a deficient number, since it is larger than the sum of its proper divisors (54186142).

68691938 is a wasteful number, since it uses less digits than its factorization.

68691938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213361.

The product of its digits is 559872, while the sum is 50.

The square root of 68691938 is about 8288.0599659993. The cubic root of 68691938 is about 409.5452781370.

The spelling of 68691938 in words is "sixty-eight million, six hundred ninety-one thousand, nine hundred thirty-eight".