747047761 has 4 divisors (see below), whose sum is σ = 748308132. Its totient is φ = 745787392.

The previous prime is 747047683. The next prime is 747047771. The reversal of 747047761 is 167740747.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167740747 = 1693 ⋅99079.

It can be written as a sum of positive squares in 2 ways, for example, as 641862225 + 105185536 = 25335^2 + 10256^2 .

It is a cyclic number.

It is not a de Polignac number, because 747047761 - 2¹⁵ = 747014993 is a prime.

It is a super-2 number, since 2×747047761² = 1116160714430226242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (747047771) 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, 629296 + ... + 630481.

It is an arithmetic number, because the mean of its divisors is an integer number (187077033).

Almost surely, 2^747047761 is an apocalyptic number.

It is an amenable number.

747047761 is a deficient number, since it is larger than the sum of its proper divisors (1260371).

747047761 is a wasteful number, since it uses less digits than its factorization.

747047761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260370.

The product of its (nonzero) digits is 230496, while the sum is 43.

The square root of 747047761 is about 27332.1744652708. The cubic root of 747047761 is about 907.3666011702.

The spelling of 747047761 in words is "seven hundred forty-seven million, forty-seven thousand, seven hundred sixty-one".