68843643 has 16 divisors (see below), whose sum is σ = 102844416. Its totient is φ = 40595040.

The previous prime is 68843629. The next prime is 68843657. The reversal of 68843643 is 34634886.

It is an interprime number because it is at equal distance from previous prime (68843629) and next prime (68843657).

It is not a de Polignac number, because 68843643 - 2¹³ = 68835451 is a prime.

It is a super-2 number, since 2×68843643² = 9478894363022898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68843595 and 68843604.

It is not an unprimeable number, because it can be changed into a prime (68843443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26971 + ... + 29412.

It is an arithmetic number, because the mean of its divisors is an integer number (6427776).

Almost surely, 2^68843643 is an apocalyptic number.

68843643 is a deficient number, since it is larger than the sum of its proper divisors (34000773).

68843643 is a wasteful number, since it uses less digits than its factorization.

68843643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56434.

The product of its digits is 331776, while the sum is 42.

The square root of 68843643 is about 8297.2069396876. The cubic root of 68843643 is about 409.8465477693.

The spelling of 68843643 in words is "sixty-eight million, eight hundred forty-three thousand, six hundred forty-three".