747851749 has 2 divisors, whose sum is σ = 747851750. Its totient is φ = 747851748.

The previous prime is 747851747. The next prime is 747851803. The reversal of 747851749 is 947158747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609201124 + 138650625 = 24682^2 + 11775^2 .

It is a cyclic number.

It is not a de Polignac number, because 747851749 - 2¹ = 747851747 is a prime.

Together with 747851747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 747851696 and 747851705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (747851747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 373925874 + 373925875.

It is an arithmetic number, because the mean of its divisors is an integer number (373925875).

Almost surely, 2^747851749 is an apocalyptic number.

It is an amenable number.

747851749 is a deficient number, since it is larger than the sum of its proper divisors (1).

747851749 is an equidigital number, since it uses as much as digits as its factorization.

747851749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 52.

The square root of 747851749 is about 27346.8782313448. The cubic root of 747851749 is about 907.6919932661.

The spelling of 747851749 in words is "seven hundred forty-seven million, eight hundred fifty-one thousand, seven hundred forty-nine".