68637029 has 2 divisors, whose sum is σ = 68637030. Its totient is φ = 68637028.

The previous prime is 68636977. The next prime is 68637031. The reversal of 68637029 is 92073686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44528929 + 24108100 = 6673^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 68637029 - 2¹⁶ = 68571493 is a prime.

It is a super-2 number, since 2×68637029² = 9422083499893682, which contains 22 as substring.

Together with 68637031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68637059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34318514 + 34318515.

It is an arithmetic number, because the mean of its divisors is an integer number (34318515).

Almost surely, 2^68637029 is an apocalyptic number.

It is an amenable number.

68637029 is a deficient number, since it is larger than the sum of its proper divisors (1).

68637029 is an equidigital number, since it uses as much as digits as its factorization.

68637029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 68637029 is about 8284.7467674033. The cubic root of 68637029 is about 409.4361255113.

The spelling of 68637029 in words is "sixty-eight million, six hundred thirty-seven thousand, twenty-nine".