69780221 has 8 divisors (see below), whose sum is σ = 79837824. Its totient is φ = 59744880.

The previous prime is 69780211. The next prime is 69780247. The reversal of 69780221 is 12208796.

It is a happy number.

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 69780221 - 2¹⁸ = 69518077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69780211) 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 7 ways as a sum of consecutive naturals, for example, 1811 + ... + 11951.

It is an arithmetic number, because the mean of its divisors is an integer number (9979728).

Almost surely, 2^69780221 is an apocalyptic number.

It is an amenable number.

69780221 is a deficient number, since it is larger than the sum of its proper divisors (10057603).

69780221 is a wasteful number, since it uses less digits than its factorization.

69780221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 69780221 is about 8353.4556322518. The cubic root of 69780221 is about 411.6967578049.

The spelling of 69780221 in words is "sixty-nine million, seven hundred eighty thousand, two hundred twenty-one".