677921212 has 12 divisors (see below), whose sum is σ = 1188103896. Its totient is φ = 338462960.

The previous prime is 677921203. The next prime is 677921219. The reversal of 677921212 is 212129776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677921219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121339 + ... + 126802.

It is an arithmetic number, because the mean of its divisors is an integer number (99008658).

Almost surely, 2^677921212 is an apocalyptic number.

It is an amenable number.

677921212 is a deficient number, since it is larger than the sum of its proper divisors (510182684).

677921212 is a wasteful number, since it uses less digits than its factorization.

677921212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248828 (or 248826 counting only the distinct ones).

The product of its digits is 21168, while the sum is 37.

The square root of 677921212 is about 26036.9201711723. The cubic root of 677921212 is about 878.4689337969.

The spelling of 677921212 in words is "six hundred seventy-seven million, nine hundred twenty-one thousand, two hundred twelve".