68831563 has 4 divisors (see below), whose sum is σ = 71051968. Its totient is φ = 66611160.

The previous prime is 68831557. The next prime is 68831569. The reversal of 68831563 is 36513886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36513886 = 2 ⋅18256943.

It is an interprime number because it is at equal distance from previous prime (68831557) and next prime (68831569).

It is a cyclic number.

It is not a de Polignac number, because 68831563 - 2⁵ = 68831531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68831569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110156 + ... + 1110217.

It is an arithmetic number, because the mean of its divisors is an integer number (17762992).

Almost surely, 2^68831563 is an apocalyptic number.

68831563 is a deficient number, since it is larger than the sum of its proper divisors (2220405).

68831563 is a wasteful number, since it uses less digits than its factorization.

68831563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220404.

The product of its digits is 103680, while the sum is 40.

The square root of 68831563 is about 8296.4789519410. The cubic root of 68831563 is about 409.8225744307.

The spelling of 68831563 in words is "sixty-eight million, eight hundred thirty-one thousand, five hundred sixty-three".