1361893 has 4 divisors (see below), whose sum is σ = 1466668. Its totient is φ = 1257120.

The previous prime is 1361879. The next prime is 1361903. The reversal of 1361893 is 3981631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3981631 = 137 ⋅29063.

It can be written as a sum of positive squares in 2 ways, for example, as 199809 + 1162084 = 447^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 1361893 - 2¹³ = 1353701 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52368 + ... + 52393.

It is an arithmetic number, because the mean of its divisors is an integer number (366667).

2^1361893 is an apocalyptic number.

1361893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1361893 is a deficient number, since it is larger than the sum of its proper divisors (104775).

1361893 is a wasteful number, since it uses less digits than its factorization.

1361893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104774.

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

The square root of 1361893 is about 1167.0017137948. The cubic root of 1361893 is about 110.8445460732.

It can be divided in two parts, 13 and 61893, that multiplied together give a square (804609 = 897²).

The spelling of 1361893 in words is "one million, three hundred sixty-one thousand, eight hundred ninety-three".