770027221 has 4 divisors (see below), whose sum is σ = 770518944. Its totient is φ = 769535500.

The previous prime is 770027207. The next prime is 770027243. The reversal of 770027221 is 122720077.

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 a de Polignac number, because none of the positive numbers 2^k-770027221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 770027221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770027261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243505 + ... + 246646.

It is an arithmetic number, because the mean of its divisors is an integer number (192629736).

Almost surely, 2^770027221 is an apocalyptic number.

It is an amenable number.

770027221 is a deficient number, since it is larger than the sum of its proper divisors (491723).

770027221 is a wasteful number, since it uses less digits than its factorization.

770027221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491722.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 770027221 is about 27749.3643350618. The cubic root of 770027221 is about 916.5764460994.

Adding to 770027221 its reverse (122720077), we get a palindrome (892747298).

The spelling of 770027221 in words is "seven hundred seventy million, twenty-seven thousand, two hundred twenty-one".