1209901164 has 12 divisors (see below), whose sum is σ = 2823102744. Its totient is φ = 403300384.

The previous prime is 1209901159. The next prime is 1209901181. The reversal of 1209901164 is 4611099021.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50412537 + ... + 50412560.

It is an arithmetic number, because the mean of its divisors is an integer number (235258562).

Almost surely, 2^1209901164 is an apocalyptic number.

It is an amenable number.

1209901164 is an abundant number, since it is smaller than the sum of its proper divisors (1613201580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209901164 is a wasteful number, since it uses less digits than its factorization.

1209901164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100825104 (or 100825102 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1209901164 is about 34783.6335652272. The cubic root of 1209901164 is about 1065.5732222403.

The spelling of 1209901164 in words is "one billion, two hundred nine million, nine hundred one thousand, one hundred sixty-four".