68504789 has 2 divisors, whose sum is σ = 68504790. Its totient is φ = 68504788.

The previous prime is 68504767. The next prime is 68504791. The reversal of 68504789 is 98740586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67782289 + 722500 = 8233^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 68504789 - 2¹⁶ = 68439253 is a prime.

It is a super-2 number, since 2×68504789² = 9385812231869042, which contains 22 as substring.

Together with 68504791, 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 (68504729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34252394 + 34252395.

It is an arithmetic number, because the mean of its divisors is an integer number (34252395).

Almost surely, 2^68504789 is an apocalyptic number.

It is an amenable number.

68504789 is a deficient number, since it is larger than the sum of its proper divisors (1).

68504789 is an equidigital number, since it uses as much as digits as its factorization.

68504789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 68504789 is about 8276.7619876374. The cubic root of 68504789 is about 409.1730088259.

The spelling of 68504789 in words is "sixty-eight million, five hundred four thousand, seven hundred eighty-nine".