1365913 has 2 divisors, whose sum is σ = 1365914. Its totient is φ = 1365912.

The previous prime is 1365911. The next prime is 1365919. The reversal of 1365913 is 3195631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327104 + 38809 = 1152^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1365913 - 2¹ = 1365911 is a prime.

Together with 1365911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1365911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682956 + 682957.

It is an arithmetic number, because the mean of its divisors is an integer number (682957).

2^1365913 is an apocalyptic number.

It is an amenable number.

1365913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365913 is an equidigital number, since it uses as much as digits as its factorization.

1365913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2430, while the sum is 28.

The square root of 1365913 is about 1168.7228071703. The cubic root of 1365913 is about 110.9535016130.

It can be divided in two parts, 1365 and 913, that added together give a triangular number (2278 = T₆₇).

The spelling of 1365913 in words is "one million, three hundred sixty-five thousand, nine hundred thirteen".