1398069427 has 2 divisors, whose sum is σ = 1398069428. Its totient is φ = 1398069426.

The previous prime is 1398069401. The next prime is 1398069433. The reversal of 1398069427 is 7249608931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7249608931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398069427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1398069437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699034713 + 699034714.

It is an arithmetic number, because the mean of its divisors is an integer number (699034714).

Almost surely, 2^1398069427 is an apocalyptic number.

1398069427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398069427 is an equidigital number, since it uses as much as digits as its factorization.

1398069427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1398069427 is about 37390.7666008602. The cubic root of 1398069427 is about 1118.1744887097.

The spelling of 1398069427 in words is "one billion, three hundred ninety-eight million, sixty-nine thousand, four hundred twenty-seven".