68621594 has 4 divisors (see below), whose sum is σ = 102932394. Its totient is φ = 34310796.

The previous prime is 68621563. The next prime is 68621621. The reversal of 68621594 is 49512686.

It is a happy number.

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., 65399569 + 3222025 = 8087^2 + 1795^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 17155397 + ... + 17155400.

Almost surely, 2^68621594 is an apocalyptic number.

68621594 is a deficient number, since it is larger than the sum of its proper divisors (34310800).

68621594 is a wasteful number, since it uses less digits than its factorization.

68621594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34310799.

The product of its digits is 103680, while the sum is 41.

The square root of 68621594 is about 8283.8151838389. The cubic root of 68621594 is about 409.4054320675.

The spelling of 68621594 in words is "sixty-eight million, six hundred twenty-one thousand, five hundred ninety-four".