1394891911 has 16 divisors (see below), whose sum is σ = 1625080320. Its totient is φ = 1172656800.

The previous prime is 1394891891. The next prime is 1394891929. The reversal of 1394891911 is 1191984931.

It is not a de Polignac number, because 1394891911 - 2¹¹ = 1394889863 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 (1394891011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66430 + ... + 84868.

It is an arithmetic number, because the mean of its divisors is an integer number (101567520).

Almost surely, 2^1394891911 is an apocalyptic number.

1394891911 is a deficient number, since it is larger than the sum of its proper divisors (230188409).

1394891911 is a wasteful number, since it uses less digits than its factorization.

1394891911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18654.

The product of its digits is 69984, while the sum is 46.

The square root of 1394891911 is about 37348.2517797018. The cubic root of 1394891911 is about 1117.3267214443.

The spelling of 1394891911 in words is "one billion, three hundred ninety-four million, eight hundred ninety-one thousand, nine hundred eleven".