68993152 has 16 divisors (see below), whose sum is σ = 137447550. Its totient is φ = 34496512.

The previous prime is 68993147. The next prime is 68993153. The reversal of 68993152 is 25139986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43349056 + 25644096 = 6584^2 + 5064^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 68993099 and 68993108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68993153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269377 + ... + 269632.

Almost surely, 2^68993152 is an apocalyptic number.

It is an amenable number.

68993152 is a deficient number, since it is larger than the sum of its proper divisors (68454398).

68993152 is an equidigital number, since it uses as much as digits as its factorization.

68993152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539023 (or 539011 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 68993152 is about 8306.2116515292. The cubic root of 68993152 is about 410.1430236694.

The spelling of 68993152 in words is "sixty-eight million, nine hundred ninety-three thousand, one hundred fifty-two".