1209910149 has 32 divisors (see below), whose sum is σ = 2050810880. Its totient is φ = 690606000.

The previous prime is 1209910133. The next prime is 1209910151. The reversal of 1209910149 is 9410199021.

It is not a de Polignac number, because 1209910149 - 2⁴ = 1209910133 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 (1209910159) 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 31 ways as a sum of consecutive naturals, for example, 195594 + ... + 201684.

It is an arithmetic number, because the mean of its divisors is an integer number (64087840).

Almost surely, 2^1209910149 is an apocalyptic number.

It is an amenable number.

1209910149 is a deficient number, since it is larger than the sum of its proper divisors (840900731).

1209910149 is a wasteful number, since it uses less digits than its factorization.

1209910149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7158 (or 7152 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 1209910149 is about 34783.7627205568. The cubic root of 1209910149 is about 1065.5758599631.

The spelling of 1209910149 in words is "one billion, two hundred nine million, nine hundred ten thousand, one hundred forty-nine".