747361561 has 4 divisors (see below), whose sum is σ = 786696400. Its totient is φ = 708026724.

The previous prime is 747361553. The next prime is 747361583. The reversal of 747361561 is 165163747.

747361561 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: 165163747 = 7 ⋅23594821.

It is a cyclic number.

It is not a de Polignac number, because 747361561 - 2³ = 747361553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747361541) 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, 19667391 + ... + 19667428.

It is an arithmetic number, because the mean of its divisors is an integer number (196674100).

Almost surely, 2^747361561 is an apocalyptic number.

It is an amenable number.

747361561 is a deficient number, since it is larger than the sum of its proper divisors (39334839).

747361561 is a wasteful number, since it uses less digits than its factorization.

747361561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39334838.

The product of its digits is 105840, while the sum is 40.

The square root of 747361561 is about 27337.9143498549. The cubic root of 747361561 is about 907.4936308801.

The spelling of 747361561 in words is "seven hundred forty-seven million, three hundred sixty-one thousand, five hundred sixty-one".