68869221 has 4 divisors (see below), whose sum is σ = 91825632. Its totient is φ = 45912812.

The previous prime is 68869211. The next prime is 68869237. The reversal of 68869221 is 12296886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68869221 - 2¹³ = 68861029 is a prime.

It is a super-2 number, since 2×68869221² = 9485939202293682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68869211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11478201 + ... + 11478206.

It is an arithmetic number, because the mean of its divisors is an integer number (22956408).

Almost surely, 2^68869221 is an apocalyptic number.

It is an amenable number.

68869221 is a deficient number, since it is larger than the sum of its proper divisors (22956411).

68869221 is a wasteful number, since it uses less digits than its factorization.

68869221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22956410.

The product of its digits is 82944, while the sum is 42.

The square root of 68869221 is about 8298.7481586080. The cubic root of 68869221 is about 409.8972992816.

The spelling of 68869221 in words is "sixty-eight million, eight hundred sixty-nine thousand, two hundred twenty-one".