68213187 has 24 divisors (see below), whose sum is σ = 112825440. Its totient is φ = 38903040.

The previous prime is 68213183. The next prime is 68213207. The reversal of 68213187 is 78131286.

It is not a de Polignac number, because 68213187 - 2² = 68213183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68213183) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 54889 + ... + 56117.

It is an arithmetic number, because the mean of its divisors is an integer number (4701060).

Almost surely, 2^68213187 is an apocalyptic number.

68213187 is a deficient number, since it is larger than the sum of its proper divisors (44612253).

68213187 is a wasteful number, since it uses less digits than its factorization.

68213187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2120 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 68213187 is about 8259.1274962916. The cubic root of 68213187 is about 408.5916121741.

The spelling of 68213187 in words is "sixty-eight million, two hundred thirteen thousand, one hundred eighty-seven".