209852949 has 4 divisors (see below), whose sum is σ = 279803936. Its totient is φ = 139901964.

The previous prime is 209852939. The next prime is 209852957. The reversal of 209852949 is 949258902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 209852949 - 2⁸ = 209852693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 209852898 and 209852907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209852939) 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, 34975489 + ... + 34975494.

It is an arithmetic number, because the mean of its divisors is an integer number (69950984).

Almost surely, 2^209852949 is an apocalyptic number.

It is an amenable number.

209852949 is a deficient number, since it is larger than the sum of its proper divisors (69950987).

209852949 is an equidigital number, since it uses as much as digits as its factorization.

209852949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69950986.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 209852949 is about 14486.3021161372. The cubic root of 209852949 is about 594.2534232502.

The spelling of 209852949 in words is "two hundred nine million, eight hundred fifty-two thousand, nine hundred forty-nine".