1393799805 has 80 divisors (see below), whose sum is σ = 2621963520. Its totient is φ = 707522688.

The previous prime is 1393799801. The next prime is 1393799809. The reversal of 1393799805 is 5089973931.

It is an interprime number because it is at equal distance from previous prime (1393799801) and next prime (1393799809).

It is not a de Polignac number, because 1393799805 - 2² = 1393799801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393799801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 703306 + ... + 705284.

It is an arithmetic number, because the mean of its divisors is an integer number (32774544).

Almost surely, 2^1393799805 is an apocalyptic number.

1393799805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1393799805 is a deficient number, since it is larger than the sum of its proper divisors (1228163715).

1393799805 is a wasteful number, since it uses less digits than its factorization.

1393799805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080 (or 2071 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The square root of 1393799805 is about 37333.6283396082. The cubic root of 1393799805 is about 1117.0350482328.

The spelling of 1393799805 in words is "one billion, three hundred ninety-three million, seven hundred ninety-nine thousand, eight hundred five".