949121618209 has 4 divisors (see below), whose sum is σ = 949130711620. Its totient is φ = 949112524800.

The previous prime is 949121618143. The next prime is 949121618243. The reversal of 949121618209 is 902816121949.

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 709342950625 + 239778667584 = 842225^2 + 489672^2 .

It is a cyclic number.

It is not a de Polignac number, because 949121618209 - 2¹¹ = 949121616161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (949121618309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4388304 + ... + 4599505.

It is an arithmetic number, because the mean of its divisors is an integer number (237282677905).

Almost surely, 2^949121618209 is an apocalyptic number.

It is an amenable number.

949121618209 is a deficient number, since it is larger than the sum of its proper divisors (9093411).

949121618209 is a wasteful number, since it uses less digits than its factorization.

949121618209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9093410.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 949121618209 in words is "nine hundred forty-nine billion, one hundred twenty-one million, six hundred eighteen thousand, two hundred nine".