68194663 has 4 divisors (see below), whose sum is σ = 70037800. Its totient is φ = 66351528.

The previous prime is 68194657. The next prime is 68194669. The reversal of 68194663 is 36649186.

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

It is an interprime number because it is at equal distance from previous prime (68194657) and next prime (68194669).

It is a cyclic number.

It is not a de Polignac number, because 68194663 - 2¹⁷ = 68063591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68194669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921513 + ... + 921586.

It is an arithmetic number, because the mean of its divisors is an integer number (17509450).

Almost surely, 2^68194663 is an apocalyptic number.

68194663 is a deficient number, since it is larger than the sum of its proper divisors (1843137).

68194663 is a wasteful number, since it uses less digits than its factorization.

68194663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843136.

The product of its digits is 186624, while the sum is 43.

The square root of 68194663 is about 8258.0059941853. The cubic root of 68194663 is about 408.5546230591.

The spelling of 68194663 in words is "sixty-eight million, one hundred ninety-four thousand, six hundred sixty-three".