1361389 has 2 divisors, whose sum is σ = 1361390. Its totient is φ = 1361388.

The previous prime is 1361387. The next prime is 1361401. The reversal of 1361389 is 9831631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 275625 = 1042^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361389 - 2¹ = 1361387 is a prime.

Together with 1361387, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1361389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680694 + 680695.

It is an arithmetic number, because the mean of its divisors is an integer number (680695).

2^1361389 is an apocalyptic number.

It is an amenable number.

1361389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361389 is an equidigital number, since it uses as much as digits as its factorization.

1361389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 1361389 is about 1166.7857558267. The cubic root of 1361389 is about 110.8308708569.

The spelling of 1361389 in words is "one million, three hundred sixty-one thousand, three hundred eighty-nine".