68251949 has 2 divisors, whose sum is σ = 68251950. Its totient is φ = 68251948.

The previous prime is 68251891. The next prime is 68251973. The reversal of 68251949 is 94915286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 12376324 = 7475^2 + 3518^2 .

It is a cyclic number.

It is not a de Polignac number, because 68251949 - 2⁸ = 68251693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68251999) 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 as a sum of consecutive naturals, namely, 34125974 + 34125975.

It is an arithmetic number, because the mean of its divisors is an integer number (34125975).

Almost surely, 2^68251949 is an apocalyptic number.

It is an amenable number.

68251949 is a deficient number, since it is larger than the sum of its proper divisors (1).

68251949 is an equidigital number, since it uses as much as digits as its factorization.

68251949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 68251949 is about 8261.4737789332. The cubic root of 68251949 is about 408.6689912938.

The spelling of 68251949 in words is "sixty-eight million, two hundred fifty-one thousand, nine hundred forty-nine".