1209891016 has 16 divisors (see below), whose sum is σ = 2269981440. Its totient is φ = 604562640.

The previous prime is 1209890989. The next prime is 1209891031. The reversal of 1209891016 is 6101989021.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 34200 + ... + 59911.

It is an arithmetic number, because the mean of its divisors is an integer number (141873840).

Almost surely, 2^1209891016 is an apocalyptic number.

It is an amenable number.

1209891016 is a deficient number, since it is larger than the sum of its proper divisors (1060090424).

1209891016 is a wasteful number, since it uses less digits than its factorization.

1209891016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95724 (or 95720 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1209891016 is about 34783.4876917195. The cubic root of 1209891016 is about 1065.5702430804.

The spelling of 1209891016 in words is "one billion, two hundred nine million, eight hundred ninety-one thousand, sixteen".