213747738 has 16 divisors (see below), whose sum is σ = 429287040. Its totient is φ = 70950656.

The previous prime is 213747689. The next prime is 213747757. The reversal of 213747738 is 837747312.

It is a self number, because there is not a number n which added to its sum of digits gives 213747738.

It is an unprimeable number.

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, 73095 + ... + 75962.

It is an arithmetic number, because the mean of its divisors is an integer number (26830440).

Almost surely, 2^213747738 is an apocalyptic number.

213747738 is an abundant number, since it is smaller than the sum of its proper divisors (215539302).

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

213747738 is a wasteful number, since it uses less digits than its factorization.

213747738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149301.

The product of its digits is 197568, while the sum is 42.

The square root of 213747738 is about 14620.1141582410. The cubic root of 213747738 is about 597.9072815911.

The spelling of 213747738 in words is "two hundred thirteen million, seven hundred forty-seven thousand, seven hundred thirty-eight".