1399485811 has 2 divisors, whose sum is σ = 1399485812. Its totient is φ = 1399485810.

The previous prime is 1399485809. The next prime is 1399485839. The reversal of 1399485811 is 1185849931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1399485811 - 2¹ = 1399485809 is a prime.

Together with 1399485809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1399489811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699742905 + 699742906.

It is an arithmetic number, because the mean of its divisors is an integer number (699742906).

Almost surely, 2^1399485811 is an apocalyptic number.

1399485811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399485811 is an equidigital number, since it uses as much as digits as its factorization.

1399485811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 49.

The square root of 1399485811 is about 37409.7020971833. The cubic root of 1399485811 is about 1118.5519687518.

The spelling of 1399485811 in words is "one billion, three hundred ninety-nine million, four hundred eighty-five thousand, eight hundred eleven".