743101561 has 4 divisors (see below), whose sum is σ = 748774224. Its totient is φ = 737428900.

The previous prime is 743101559. The next prime is 743101607. The reversal of 743101561 is 165101347.

743101561 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165101347 = 1667 ⋅99041.

It is a cyclic number.

It is not a de Polignac number, because 743101561 - 2¹ = 743101559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (743101061) 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, 2836135 + ... + 2836396.

It is an arithmetic number, because the mean of its divisors is an integer number (187193556).

Almost surely, 2^743101561 is an apocalyptic number.

It is an amenable number.

743101561 is a deficient number, since it is larger than the sum of its proper divisors (5672663).

743101561 is a wasteful number, since it uses less digits than its factorization.

743101561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672662.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 743101561 is about 27259.8892330838. The cubic root of 743101561 is about 905.7660906284.

It can be divided in two parts, 7431015 and 61, that added together give a square (7431076 = 2726²).

The spelling of 743101561 in words is "seven hundred forty-three million, one hundred one thousand, five hundred sixty-one".