68398581 has 8 divisors (see below), whose sum is σ = 91350784. Its totient is φ = 45522720.

The previous prime is 68398579. The next prime is 68398601. The reversal of 68398581 is 18589386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68398581 - 2¹ = 68398579 is a prime.

It is a super-2 number, since 2×68398581² = 9356731765627122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68398581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68398571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16960 + ... + 20601.

It is an arithmetic number, because the mean of its divisors is an integer number (11418848).

Almost surely, 2^68398581 is an apocalyptic number.

It is an amenable number.

68398581 is a deficient number, since it is larger than the sum of its proper divisors (22952203).

68398581 is a wasteful number, since it uses less digits than its factorization.

68398581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38171.

The product of its digits is 414720, while the sum is 48.

The square root of 68398581 is about 8270.3434632426. The cubic root of 68398581 is about 408.9614424748.

The spelling of 68398581 in words is "sixty-eight million, three hundred ninety-eight thousand, five hundred eighty-one".