213078689 has 8 divisors (see below), whose sum is σ = 220667520. Its totient is φ = 205506000.

The previous prime is 213078661. The next prime is 213078707. The reversal of 213078689 is 986870312.

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 213078689 - 2⁸ = 213078433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213078659) 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, 26984 + ... + 33974.

It is an arithmetic number, because the mean of its divisors is an integer number (27583440).

Almost surely, 2^213078689 is an apocalyptic number.

213078689 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

213078689 is a deficient number, since it is larger than the sum of its proper divisors (7588831).

213078689 is a wasteful number, since it uses less digits than its factorization.

213078689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 213078689 is about 14597.2151111094. The cubic root of 213078689 is about 597.2827956506.

The spelling of 213078689 in words is "two hundred thirteen million, seventy-eight thousand, six hundred eighty-nine".