743761 has 4 divisors (see below), whose sum is σ = 745524. Its totient is φ = 742000.

The previous prime is 743747. The next prime is 743777. The reversal of 743761 is 167347.

743761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167347 = 71 ⋅2357.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 172225 = 756^2 + 415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743761 is a prime.

It is an Ulam number.

It is a Duffinian number.

743761 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (743711) 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, 171 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (186381).

2⁷⁴³⁷⁶¹ is an apocalyptic number.

It is an amenable number.

743761 is a deficient number, since it is larger than the sum of its proper divisors (1763).

743761 is a wasteful number, since it uses less digits than its factorization.

743761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762.

The product of its digits is 3528, while the sum is 28.

The square root of 743761 is about 862.4157929908. The cubic root of 743761 is about 90.6033941359.

The spelling of 743761 in words is "seven hundred forty-three thousand, seven hundred sixty-one".