747952561 has 4 divisors (see below), whose sum is σ = 748723824. Its totient is φ = 747181300.

The previous prime is 747952523. The next prime is 747952609. The reversal of 747952561 is 165259747.

747952561 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.

It is a cyclic number.

It is not a de Polignac number, because 747952561 - 2¹⁵ = 747919793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747952661) 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, 384175 + ... + 386116.

It is an arithmetic number, because the mean of its divisors is an integer number (187180956).

Almost surely, 2^747952561 is an apocalyptic number.

It is an amenable number.

747952561 is a deficient number, since it is larger than the sum of its proper divisors (771263).

747952561 is an equidigital number, since it uses as much as digits as its factorization.

747952561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771262.

The product of its digits is 529200, while the sum is 46.

The square root of 747952561 is about 27348.7213777902. The cubic root of 747952561 is about 907.7327777014.

The spelling of 747952561 in words is "seven hundred forty-seven million, nine hundred fifty-two thousand, five hundred sixty-one".