68915963 has 4 divisors (see below), whose sum is σ = 68976888. Its totient is φ = 68855040.

The previous prime is 68915933. The next prime is 68915969. The reversal of 68915963 is 36951986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36951986 = 2 ⋅18475993.

It is a cyclic number.

It is not a de Polignac number, because 68915963 - 2¹² = 68911867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68915969) 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, 28733 + ... + 31038.

It is an arithmetic number, because the mean of its divisors is an integer number (17244222).

Almost surely, 2^68915963 is an apocalyptic number.

68915963 is a deficient number, since it is larger than the sum of its proper divisors (60925).

68915963 is a wasteful number, since it uses less digits than its factorization.

68915963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60924.

The product of its digits is 349920, while the sum is 47.

The square root of 68915963 is about 8301.5638888103. The cubic root of 68915963 is about 409.9900116543.

The spelling of 68915963 in words is "sixty-eight million, nine hundred fifteen thousand, nine hundred sixty-three".