1398868727 has 2 divisors, whose sum is σ = 1398868728. Its totient is φ = 1398868726.

The previous prime is 1398868699. The next prime is 1398868729. The reversal of 1398868727 is 7278688931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1398868727 - 2⁶ = 1398868663 is a prime.

Together with 1398868729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398868729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699434363 + 699434364.

It is an arithmetic number, because the mean of its divisors is an integer number (699434364).

Almost surely, 2^1398868727 is an apocalyptic number.

1398868727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398868727 is an equidigital number, since it uses as much as digits as its factorization.

1398868727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 59.

The square root of 1398868727 is about 37401.4535412730. The cubic root of 1398868727 is about 1118.3875412187.

The spelling of 1398868727 in words is "one billion, three hundred ninety-eight million, eight hundred sixty-eight thousand, seven hundred twenty-seven".