68215937 has 2 divisors, whose sum is σ = 68215938. Its totient is φ = 68215936.

The previous prime is 68215879. The next prime is 68215943. The reversal of 68215937 is 73951286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43970161 + 24245776 = 6631^2 + 4924^2 .

It is a cyclic number.

It is not a de Polignac number, because 68215937 - 2²⁰ = 67167361 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68215894 and 68215903.

It is not a weakly prime, because it can be changed into another prime (68211937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34107968 + 34107969.

It is an arithmetic number, because the mean of its divisors is an integer number (34107969).

Almost surely, 2^68215937 is an apocalyptic number.

It is an amenable number.

68215937 is a deficient number, since it is larger than the sum of its proper divisors (1).

68215937 is an equidigital number, since it uses as much as digits as its factorization.

68215937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 68215937 is about 8259.2939770903. The cubic root of 68215937 is about 408.5971028614.

The spelling of 68215937 in words is "sixty-eight million, two hundred fifteen thousand, nine hundred thirty-seven".