1399447207 has 2 divisors, whose sum is σ = 1399447208. Its totient is φ = 1399447206.

The previous prime is 1399447201. The next prime is 1399447211. The reversal of 1399447207 is 7027449931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7027449931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399447207 - 2³ = 1399447199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399447201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699723603 + 699723604.

It is an arithmetic number, because the mean of its divisors is an integer number (699723604).

Almost surely, 2^1399447207 is an apocalyptic number.

1399447207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399447207 is an equidigital number, since it uses as much as digits as its factorization.

1399447207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The square root of 1399447207 is about 37409.1861312165. The cubic root of 1399447207 is about 1118.5416837893.

The spelling of 1399447207 in words is "one billion, three hundred ninety-nine million, four hundred forty-seven thousand, two hundred seven".