1398768611 has 2 divisors, whose sum is σ = 1398768612. Its totient is φ = 1398768610.

The previous prime is 1398768607. The next prime is 1398768643. The reversal of 1398768611 is 1168678931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1398768611 - 2² = 1398768607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1398768611.

It is not a weakly prime, because it can be changed into another prime (1398768661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699384305 + 699384306.

It is an arithmetic number, because the mean of its divisors is an integer number (699384306).

Almost surely, 2^1398768611 is an apocalyptic number.

1398768611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398768611 is an equidigital number, since it uses as much as digits as its factorization.

1398768611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 1398768611 is about 37400.1151201437. The cubic root of 1398768611 is about 1118.3608598591.

The spelling of 1398768611 in words is "one billion, three hundred ninety-eight million, seven hundred sixty-eight thousand, six hundred eleven".