68942737 has 2 divisors, whose sum is σ = 68942738. Its totient is φ = 68942736.

The previous prime is 68942723. The next prime is 68942759. The reversal of 68942737 is 73724986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 19395216 = 7039^2 + 4404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68942737 is a prime.

It is not a weakly prime, because it can be changed into another prime (68942767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34471368 + 34471369.

It is an arithmetic number, because the mean of its divisors is an integer number (34471369).

Almost surely, 2^68942737 is an apocalyptic number.

It is an amenable number.

68942737 is a deficient number, since it is larger than the sum of its proper divisors (1).

68942737 is an equidigital number, since it uses as much as digits as its factorization.

68942737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 68942737 is about 8303.1763199393. The cubic root of 68942737 is about 410.0430987809.

The spelling of 68942737 in words is "sixty-eight million, nine hundred forty-two thousand, seven hundred thirty-seven".