213000978 has 16 divisors (see below), whose sum is σ = 426171456. Its totient is φ = 70972080.

The previous prime is 213000967. The next prime is 213000979. The reversal of 213000978 is 879000312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213000979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14200 + ... + 25052.

It is an arithmetic number, because the mean of its divisors is an integer number (26635716).

Almost surely, 2^213000978 is an apocalyptic number.

213000978 is an abundant number, since it is smaller than the sum of its proper divisors (213170478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213000978 is a wasteful number, since it uses less digits than its factorization.

213000978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14129.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 213000978 is about 14594.5530250159. The cubic root of 213000978 is about 597.2101760198.

The spelling of 213000978 in words is "two hundred thirteen million, nine hundred seventy-eight", and thus it is an aban number.