778812213 has 8 divisors (see below), whose sum is σ = 1056016800. Its totient is φ = 510407888.

The previous prime is 778812121. The next prime is 778812227. The reversal of 778812213 is 312218877.

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 778812213 - 2¹³ = 778804021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778814213) 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 7 ways as a sum of consecutive naturals, for example, 2199858 + ... + 2200211.

It is an arithmetic number, because the mean of its divisors is an integer number (132002100).

Almost surely, 2^778812213 is an apocalyptic number.

It is an amenable number.

778812213 is a deficient number, since it is larger than the sum of its proper divisors (277204587).

778812213 is a wasteful number, since it uses less digits than its factorization.

778812213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400131.

The product of its digits is 37632, while the sum is 39.

The square root of 778812213 is about 27907.2071873916. The cubic root of 778812213 is about 920.0489155624.

The spelling of 778812213 in words is "seven hundred seventy-eight million, eight hundred twelve thousand, two hundred thirteen".