736861 has 4 divisors (see below), whose sum is σ = 762300. Its totient is φ = 711424.

The previous prime is 736847. The next prime is 736867. The reversal of 736861 is 168637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168637 = 7 ⋅24091.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 534361 = 450^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 736861 - 2¹¹ = 734813 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

736861 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 736861.

It is not an unprimeable number, because it can be changed into a prime (736867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12676 + ... + 12733.

It is an arithmetic number, because the mean of its divisors is an integer number (190575).

2⁷³⁶⁸⁶¹ is an apocalyptic number.

It is an amenable number.

736861 is a deficient number, since it is larger than the sum of its proper divisors (25439).

736861 is a wasteful number, since it uses less digits than its factorization.

736861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25438.

The product of its digits is 6048, while the sum is 31.

The square root of 736861 is about 858.4060810595. The cubic root of 736861 is about 90.3223420706.

The spelling of 736861 in words is "seven hundred thirty-six thousand, eight hundred sixty-one".