1389727 has 2 divisors, whose sum is σ = 1389728. Its totient is φ = 1389726.

The previous prime is 1389697. The next prime is 1389749. The reversal of 1389727 is 7279831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1389727 is a prime.

It is a super-2 number, since 2×1389727² = 3862682269058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694863 + 694864.

It is an arithmetic number, because the mean of its divisors is an integer number (694864).

2^1389727 is an apocalyptic number.

1389727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389727 is an equidigital number, since it uses as much as digits as its factorization.

1389727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 1389727 is about 1178.8668287809. The cubic root of 1389727 is about 111.5945962021.

It can be divided in two parts, 13897 and 27, that added together give a square (13924 = 118²).

The spelling of 1389727 in words is "one million, three hundred eighty-nine thousand, seven hundred twenty-seven".