1394921853 has 12 divisors (see below), whose sum is σ = 2169878620. Its totient is φ = 858413376.

The previous prime is 1394921809. The next prime is 1394921897. The reversal of 1394921853 is 3581294931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1394921809) and next prime (1394921897).

It can be written as a sum of positive squares in 2 ways, for example, as 311063769 + 1083858084 = 17637^2 + 32922^2 .

It is not a de Polignac number, because 1394921853 - 2⁸ = 1394921597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1394921799 and 1394921808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394921153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5961088 + ... + 5961321.

Almost surely, 2^1394921853 is an apocalyptic number.

1394921853 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1394921853 is a deficient number, since it is larger than the sum of its proper divisors (774956767).

1394921853 is a wasteful number, since it uses less digits than its factorization.

1394921853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11922428 (or 11922425 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1394921853 is about 37348.6526262997. The cubic root of 1394921853 is about 1117.3347160320.

The spelling of 1394921853 in words is "one billion, three hundred ninety-four million, nine hundred twenty-one thousand, eight hundred fifty-three".