1394645897 has 2 divisors, whose sum is σ = 1394645898. Its totient is φ = 1394645896.

The previous prime is 1394645851. The next prime is 1394645909. The reversal of 1394645897 is 7985464931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1379676736 + 14969161 = 37144^2 + 3869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394645897 - 2¹⁰ = 1394644873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1390645897) 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 as a sum of consecutive naturals, namely, 697322948 + 697322949.

It is an arithmetic number, because the mean of its divisors is an integer number (697322949).

Almost surely, 2^1394645897 is an apocalyptic number.

It is an amenable number.

1394645897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394645897 is an equidigital number, since it uses as much as digits as its factorization.

1394645897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 56.

The square root of 1394645897 is about 37344.9581202068. The cubic root of 1394645897 is about 1117.2610307683.

The spelling of 1394645897 in words is "one billion, three hundred ninety-four million, six hundred forty-five thousand, eight hundred ninety-seven".