68396945 has 8 divisors (see below), whose sum is σ = 82999080. Its totient is φ = 54102400.

The previous prime is 68396929. The next prime is 68396947. The reversal of 68396945 is 54969386.

It can be written as a sum of positive squares in 4 ways, for example, as 8427409 + 59969536 = 2903^2 + 7744^2 .

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

It is not a de Polignac number, because 68396945 - 2⁴ = 68396929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68396893 and 68396902.

It is not an unprimeable number, because it can be changed into a prime (68396947) 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, 76406 + ... + 77295.

It is an arithmetic number, because the mean of its divisors is an integer number (10374885).

Almost surely, 2^68396945 is an apocalyptic number.

It is an amenable number.

68396945 is a deficient number, since it is larger than the sum of its proper divisors (14602135).

68396945 is a wasteful number, since it uses less digits than its factorization.

68396945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153795.

The product of its digits is 1399680, while the sum is 50.

The square root of 68396945 is about 8270.2445550298. The cubic root of 68396945 is about 408.9581818504.

The spelling of 68396945 in words is "sixty-eight million, three hundred ninety-six thousand, nine hundred forty-five".