68921859 has 16 divisors (see below), whose sum is σ = 97804800. Its totient is φ = 43021440.

The previous prime is 68921857. The next prime is 68921863. The reversal of 68921859 is 95812986.

It is a happy number.

It is not a de Polignac number, because 68921859 - 2¹ = 68921857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68921857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6754 + ... + 13544.

It is an arithmetic number, because the mean of its divisors is an integer number (6112800).

Almost surely, 2^68921859 is an apocalyptic number.

68921859 is a deficient number, since it is larger than the sum of its proper divisors (28882941).

68921859 is a wasteful number, since it uses less digits than its factorization.

68921859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7010.

The product of its digits is 311040, while the sum is 48.

The square root of 68921859 is about 8301.9189950276. The cubic root of 68921859 is about 410.0017033441.

The spelling of 68921859 in words is "sixty-eight million, nine hundred twenty-one thousand, eight hundred fifty-nine".