68428617 has 4 divisors (see below), whose sum is σ = 91238160. Its totient is φ = 45619076.

The previous prime is 68428573. The next prime is 68428637. The reversal of 68428617 is 71682486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68428617 - 2⁸ = 68428361 is a prime.

It is a super-3 number, since 3×68428617³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68428637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11404767 + ... + 11404772.

It is an arithmetic number, because the mean of its divisors is an integer number (22809540).

Almost surely, 2^68428617 is an apocalyptic number.

It is an amenable number.

68428617 is a deficient number, since it is larger than the sum of its proper divisors (22809543).

68428617 is a wasteful number, since it uses less digits than its factorization.

68428617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22809542.

The product of its digits is 129024, while the sum is 42.

The square root of 68428617 is about 8272.1591498230. The cubic root of 68428617 is about 409.0212963885.

The spelling of 68428617 in words is "sixty-eight million, four hundred twenty-eight thousand, six hundred seventeen".