68399522 has 8 divisors (see below), whose sum is σ = 102999276. Its totient is φ = 34066432.

The previous prime is 68399503. The next prime is 68399531. The reversal of 68399522 is 22599386.

It can be written as a sum of positive squares in 2 ways, for example, as 54479161 + 13920361 = 7381^2 + 3731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 66023 + ... + 67050.

Almost surely, 2^68399522 is an apocalyptic number.

68399522 is a deficient number, since it is larger than the sum of its proper divisors (34599754).

68399522 is a wasteful number, since it uses less digits than its factorization.

68399522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133332.

The product of its digits is 233280, while the sum is 44.

The square root of 68399522 is about 8270.4003530663. The cubic root of 68399522 is about 408.9633179082.

It can be divided in two parts, 68399 and 522, that added together give a cube (68921 = 41³).

The spelling of 68399522 in words is "sixty-eight million, three hundred ninety-nine thousand, five hundred twenty-two".