1394650009 has 2 divisors, whose sum is σ = 1394650010. Its totient is φ = 1394650008.

The previous prime is 1394650007. The next prime is 1394650051. The reversal of 1394650009 is 9000564931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1359544384 + 35105625 = 36872^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394650009 - 2¹ = 1394650007 is a prime.

Together with 1394650007, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1394650009.

It is not a weakly prime, because it can be changed into another prime (1394650001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697325004 + 697325005.

It is an arithmetic number, because the mean of its divisors is an integer number (697325005).

Almost surely, 2^1394650009 is an apocalyptic number.

It is an amenable number.

1394650009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394650009 is an equidigital number, since it uses as much as digits as its factorization.

1394650009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1394650009 is about 37345.0131744521. The cubic root of 1394650009 is about 1117.2621288183.

The spelling of 1394650009 in words is "one billion, three hundred ninety-four million, six hundred fifty thousand, nine".