68909198 has 4 divisors (see below), whose sum is σ = 103363800. Its totient is φ = 34454598.

The previous prime is 68909189. The next prime is 68909201. The reversal of 68909198 is 89190986.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17227298 + ... + 17227301.

It is an arithmetic number, because the mean of its divisors is an integer number (25840950).

Almost surely, 2^68909198 is an apocalyptic number.

68909198 is a deficient number, since it is larger than the sum of its proper divisors (34454602).

68909198 is a wasteful number, since it uses less digits than its factorization.

68909198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34454601.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 68909198 is about 8301.1564254627. The cubic root of 68909198 is about 409.9765959276.

The spelling of 68909198 in words is "sixty-eight million, nine hundred nine thousand, one hundred ninety-eight".