1394997359 has 4 divisors (see below), whose sum is σ = 1594282704. Its totient is φ = 1195712016.

The previous prime is 1394997301. The next prime is 1394997371. The reversal of 1394997359 is 9537994931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9537994931 = 18919 ⋅504149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1394997359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1394997298 and 1394997307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394997389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99642662 + ... + 99642675.

It is an arithmetic number, because the mean of its divisors is an integer number (398570676).

Almost surely, 2^1394997359 is an apocalyptic number.

1394997359 is a deficient number, since it is larger than the sum of its proper divisors (199285345).

1394997359 is an equidigital number, since it uses as much as digits as its factorization.

1394997359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199285344.

The product of its digits is 8266860, while the sum is 59.

The square root of 1394997359 is about 37349.6634389120. The cubic root of 1394997359 is about 1117.3548758120.

The spelling of 1394997359 in words is "one billion, three hundred ninety-four million, nine hundred ninety-seven thousand, three hundred fifty-nine".