68550491 has 4 divisors (see below), whose sum is σ = 69043800. Its totient is φ = 68057184.

The previous prime is 68550481. The next prime is 68550497. The reversal of 68550491 is 19405586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68550491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68550497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246446 + ... + 246723.

It is an arithmetic number, because the mean of its divisors is an integer number (17260950).

Almost surely, 2^68550491 is an apocalyptic number.

68550491 is a deficient number, since it is larger than the sum of its proper divisors (493309).

68550491 is a wasteful number, since it uses less digits than its factorization.

68550491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493308.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 68550491 is about 8279.5223896068. The cubic root of 68550491 is about 409.2639799252.

The spelling of 68550491 in words is "sixty-eight million, five hundred fifty thousand, four hundred ninety-one".