68516393 has 8 divisors (see below), whose sum is σ = 74820000. Its totient is φ = 62225280.

The previous prime is 68516377. The next prime is 68516407. The reversal of 68516393 is 39361586.

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

It is a cyclic number.

It is not a de Polignac number, because 68516393 - 2⁴ = 68516377 is a prime.

It is a super-2 number, since 2×68516393² = 9388992219460898, 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 68516393.

It is not an unprimeable number, because it can be changed into a prime (68516323) 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, 11246 + ... + 16232.

It is an arithmetic number, because the mean of its divisors is an integer number (9352500).

Almost surely, 2^68516393 is an apocalyptic number.

It is an amenable number.

68516393 is a deficient number, since it is larger than the sum of its proper divisors (6303607).

68516393 is a wasteful number, since it uses less digits than its factorization.

68516393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247.

The product of its digits is 116640, while the sum is 41.

The square root of 68516393 is about 8277.4629567277. The cubic root of 68516393 is about 409.1961107413.

The spelling of 68516393 in words is "sixty-eight million, five hundred sixteen thousand, three hundred ninety-three".