1908994069 has 8 divisors (see below), whose sum is σ = 1928813120. Its totient is φ = 1889378028.

The previous prime is 1908994027. The next prime is 1908994081. The reversal of 1908994069 is 9604998091.

It is not a de Polignac number, because 1908994069 - 2²¹ = 1906896917 is a prime.

It is a super-2 number, since 2×1908994069² = 7288516710954353522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908994369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091854 + ... + 1093600.

It is an arithmetic number, because the mean of its divisors is an integer number (241101640).

Almost surely, 2^1908994069 is an apocalyptic number.

It is an amenable number.

1908994069 is a deficient number, since it is larger than the sum of its proper divisors (19819051).

1908994069 is an frugal number, since it uses more digits than its factorization.

1908994069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 1908994069 is about 43692.0366771795. The cubic root of 1908994069 is about 1240.5135899287.

The spelling of 1908994069 in words is "one billion, nine hundred eight million, nine hundred ninety-four thousand, sixty-nine".