68641699 has 24 divisors (see below), whose sum is σ = 89015760. Its totient is φ = 52448256.

The previous prime is 68641691. The next prime is 68641711. The reversal of 68641699 is 99614686.

It is not a de Polignac number, because 68641699 - 2³ = 68641691 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68641691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13659 + ... + 17995.

It is an arithmetic number, because the mean of its divisors is an integer number (3708990).

Almost surely, 2^68641699 is an apocalyptic number.

68641699 is a deficient number, since it is larger than the sum of its proper divisors (20374061).

68641699 is a wasteful number, since it uses less digits than its factorization.

68641699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387 (or 4380 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 68641699 is about 8285.0286058649. The cubic root of 68641699 is about 409.4454111858.

The spelling of 68641699 in words is "sixty-eight million, six hundred forty-one thousand, six hundred ninety-nine".