212003749 has 4 divisors (see below), whose sum is σ = 212319436. Its totient is φ = 211688064.

The previous prime is 212003713. The next prime is 212003783. The reversal of 212003749 is 947300212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116316225 + 95687524 = 10785^2 + 9782^2 .

It is a cyclic number.

It is not a de Polignac number, because 212003749 - 2¹⁵ = 211970981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212006749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156834 + ... + 158179.

It is an arithmetic number, because the mean of its divisors is an integer number (53079859).

Almost surely, 2^212003749 is an apocalyptic number.

It is an amenable number.

212003749 is a deficient number, since it is larger than the sum of its proper divisors (315687).

212003749 is an equidigital number, since it uses as much as digits as its factorization.

212003749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315686.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 212003749 is about 14560.3485191804. The cubic root of 212003749 is about 596.2767105779.

The spelling of 212003749 in words is "two hundred twelve million, three thousand, seven hundred forty-nine".