68144933 has 2 divisors, whose sum is σ = 68144934. Its totient is φ = 68144932.

The previous prime is 68144899. The next prime is 68144939. The reversal of 68144933 is 33944186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67930564 + 214369 = 8242^2 + 463^2 .

It is a cyclic number.

It is not a de Polignac number, because 68144933 - 2⁸ = 68144677 is a prime.

It is a super-4 number, since 4×68144933⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68144939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34072466 + 34072467.

It is an arithmetic number, because the mean of its divisors is an integer number (34072467).

Almost surely, 2^68144933 is an apocalyptic number.

It is an amenable number.

68144933 is a deficient number, since it is larger than the sum of its proper divisors (1).

68144933 is an equidigital number, since it uses as much as digits as its factorization.

68144933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 68144933 is about 8254.9944276177. The cubic root of 68144933 is about 408.4552880025.

The spelling of 68144933 in words is "sixty-eight million, one hundred forty-four thousand, nine hundred thirty-three".