68397946 has 4 divisors (see below), whose sum is σ = 102596922. Its totient is φ = 34198972.

The previous prime is 68397943. The next prime is 68397977. The reversal of 68397946 is 64979386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 43046721 + 25351225 = 6561^2 + 5035^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68397893 and 68397902.

It is not an unprimeable number, because it can be changed into a prime (68397943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17099485 + ... + 17099488.

Almost surely, 2^68397946 is an apocalyptic number.

68397946 is a deficient number, since it is larger than the sum of its proper divisors (34198976).

68397946 is a wasteful number, since it uses less digits than its factorization.

68397946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34198975.

The product of its digits is 1959552, while the sum is 52.

The square root of 68397946 is about 8270.3050729704. The cubic root of 68397946 is about 408.9601768963.

The spelling of 68397946 in words is "sixty-eight million, three hundred ninety-seven thousand, nine hundred forty-six".