68717783 has 2 divisors, whose sum is σ = 68717784. Its totient is φ = 68717782.

The previous prime is 68717773. The next prime is 68717821. The reversal of 68717783 is 38771786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68717783 - 2⁸ = 68717527 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 (68717773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34358891 + 34358892.

It is an arithmetic number, because the mean of its divisors is an integer number (34358892).

Almost surely, 2^68717783 is an apocalyptic number.

68717783 is a deficient number, since it is larger than the sum of its proper divisors (1).

68717783 is an equidigital number, since it uses as much as digits as its factorization.

68717783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 47.

The square root of 68717783 is about 8289.6189900381. The cubic root of 68717783 is about 409.5966348213.

The spelling of 68717783 in words is "sixty-eight million, seven hundred seventeen thousand, seven hundred eighty-three".