1393397907 has 16 divisors (see below), whose sum is σ = 2037381120. Its totient is φ = 840058400.

The previous prime is 1393397893. The next prime is 1393397921. The reversal of 1393397907 is 7097933931.

It is an interprime number because it is at equal distance from previous prime (1393397893) and next prime (1393397921).

It is a cyclic number.

It is not a de Polignac number, because 1393397907 - 2⁷ = 1393397779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1393397907.

It is not an unprimeable number, because it can be changed into a prime (1393397947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104232 + ... + 116837.

It is an arithmetic number, because the mean of its divisors is an integer number (127336320).

Almost surely, 2^1393397907 is an apocalyptic number.

1393397907 is a deficient number, since it is larger than the sum of its proper divisors (643983213).

1393397907 is a wasteful number, since it uses less digits than its factorization.

1393397907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221274.

The product of its (nonzero) digits is 964467, while the sum is 51.

The square root of 1393397907 is about 37328.2454315763. The cubic root of 1393397907 is about 1116.9276733414.

The spelling of 1393397907 in words is "one billion, three hundred ninety-three million, three hundred ninety-seven thousand, nine hundred seven".