68402153 has 2 divisors, whose sum is σ = 68402154. Its totient is φ = 68402152.

The previous prime is 68402123. The next prime is 68402189. The reversal of 68402153 is 35120486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46199209 + 22202944 = 6797^2 + 4712^2 .

It is a cyclic number.

It is not a de Polignac number, because 68402153 - 2¹⁰ = 68401129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68402123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34201076 + 34201077.

It is an arithmetic number, because the mean of its divisors is an integer number (34201077).

Almost surely, 2^68402153 is an apocalyptic number.

It is an amenable number.

68402153 is a deficient number, since it is larger than the sum of its proper divisors (1).

68402153 is an equidigital number, since it uses as much as digits as its factorization.

68402153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 68402153 is about 8270.5594127604. The cubic root of 68402153 is about 408.9685614570.

The spelling of 68402153 in words is "sixty-eight million, four hundred two thousand, one hundred fifty-three".