211742979 has 16 divisors (see below), whose sum is σ = 322924800. Its totient is φ = 120895200.

The previous prime is 211742969. The next prime is 211742987. The reversal of 211742979 is 979247112.

211742979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211742979 - 2⁴ = 211742963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211742979.

It is not an unprimeable number, because it can be changed into a prime (211742929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26997 + ... + 33945.

It is an arithmetic number, because the mean of its divisors is an integer number (20182800).

Almost surely, 2^211742979 is an apocalyptic number.

211742979 is a deficient number, since it is larger than the sum of its proper divisors (111181821).

211742979 is a wasteful number, since it uses less digits than its factorization.

211742979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410.

The product of its digits is 63504, while the sum is 42.

The square root of 211742979 is about 14551.3909644405. The cubic root of 211742979 is about 596.0321317677.

The spelling of 211742979 in words is "two hundred eleven million, seven hundred forty-two thousand, nine hundred seventy-nine".