68730191 has 4 divisors (see below), whose sum is σ = 68922000. Its totient is φ = 68538384.

The previous prime is 68730169. The next prime is 68730199. The reversal of 68730191 is 19103786.

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

It is a cyclic number.

It is not a de Polignac number, because 68730191 - 2¹⁴ = 68713807 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 (68730199) 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, 95366 + ... + 96083.

It is an arithmetic number, because the mean of its divisors is an integer number (17230500).

Almost surely, 2^68730191 is an apocalyptic number.

68730191 is a deficient number, since it is larger than the sum of its proper divisors (191809).

68730191 is a wasteful number, since it uses less digits than its factorization.

68730191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191808.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 68730191 is about 8290.3673621861. The cubic root of 68730191 is about 409.6212862238.

It can be divided in two parts, 68730 and 191, that added together give a cube (68921 = 41³).

The spelling of 68730191 in words is "sixty-eight million, seven hundred thirty thousand, one hundred ninety-one".