68919394 has 16 divisors (see below), whose sum is σ = 110102328. Its totient is φ = 32242432.

The previous prime is 68919391. The next prime is 68919407. The reversal of 68919394 is 49391986.

It can be written as a sum of positive squares in 4 ways, for example, as 60140025 + 8779369 = 7755^2 + 2963^2 .

It is not an unprimeable number, because it can be changed into a prime (68919391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24 + ... + 11740.

Almost surely, 2^68919394 is an apocalyptic number.

68919394 is a deficient number, since it is larger than the sum of its proper divisors (41182934).

68919394 is a wasteful number, since it uses less digits than its factorization.

68919394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11909.

The product of its digits is 419904, while the sum is 49.

The square root of 68919394 is about 8301.7705340487. The cubic root of 68919394 is about 409.9968153629.

The spelling of 68919394 in words is "sixty-eight million, nine hundred nineteen thousand, three hundred ninety-four".