68819629 has 2 divisors, whose sum is σ = 68819630. Its totient is φ = 68819628.

The previous prime is 68819603. The next prime is 68819633. The reversal of 68819629 is 92691886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38316100 + 30503529 = 6190^2 + 5523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68819629 is a prime.

It is a super-2 number, since 2×68819629² = 9472282671395282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68819129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34409814 + 34409815.

It is an arithmetic number, because the mean of its divisors is an integer number (34409815).

Almost surely, 2^68819629 is an apocalyptic number.

It is an amenable number.

68819629 is a deficient number, since it is larger than the sum of its proper divisors (1).

68819629 is an equidigital number, since it uses as much as digits as its factorization.

68819629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 68819629 is about 8295.7596999913. The cubic root of 68819629 is about 409.7988880816.

The spelling of 68819629 in words is "sixty-eight million, eight hundred nineteen thousand, six hundred twenty-nine".