68420109 has 16 divisors (see below), whose sum is σ = 93864960. Its totient is φ = 44309040.

The previous prime is 68420089. The next prime is 68420111. The reversal of 68420109 is 90102486.

It is not a de Polignac number, because 68420109 - 2¹² = 68416013 is a prime.

It is a super-2 number, since 2×68420109² = 9362622631143762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68420609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17854 + ... + 21344.

It is an arithmetic number, because the mean of its divisors is an integer number (5866560).

Almost surely, 2^68420109 is an apocalyptic number.

It is an amenable number.

68420109 is a deficient number, since it is larger than the sum of its proper divisors (25444851).

68420109 is a wasteful number, since it uses less digits than its factorization.

68420109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 68420109 is about 8271.6448787409. The cubic root of 68420109 is about 409.0043439419.

The spelling of 68420109 in words is "sixty-eight million, four hundred twenty thousand, one hundred nine".