211972747 has 8 divisors (see below), whose sum is σ = 248163552. Its totient is φ = 177259200.

The previous prime is 211972729. The next prime is 211972769. The reversal of 211972747 is 747279112.

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 211972747 - 2⁷ = 211972619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211972727) 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, 369004 + ... + 369577.

It is an arithmetic number, because the mean of its divisors is an integer number (31020444).

Almost surely, 2^211972747 is an apocalyptic number.

211972747 is a deficient number, since it is larger than the sum of its proper divisors (36190805).

211972747 is an equidigital number, since it uses as much as digits as its factorization.

211972747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738629.

The product of its digits is 49392, while the sum is 40.

The square root of 211972747 is about 14559.2838766198. The cubic root of 211972747 is about 596.2476439980.

The spelling of 211972747 in words is "two hundred eleven million, nine hundred seventy-two thousand, seven hundred forty-seven".