749509423 has 24 divisors (see below), whose sum is σ = 836517888. Its totient is φ = 670898592.

The previous prime is 749509399. The next prime is 749509429. The reversal of 749509423 is 324905947.

It is not a de Polignac number, because 749509423 - 2⁹ = 749508911 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 749509423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749509429) 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 in 23 ways as a sum of consecutive naturals, for example, 1008390 + ... + 1009132.

It is an arithmetic number, because the mean of its divisors is an integer number (34854912).

Almost surely, 2^749509423 is an apocalyptic number.

749509423 is a deficient number, since it is larger than the sum of its proper divisors (87008465).

749509423 is a wasteful number, since it uses less digits than its factorization.

749509423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 749509423 is about 27377.1697404973. The cubic root of 749509423 is about 908.3621559708.

The spelling of 749509423 in words is "seven hundred forty-nine million, five hundred nine thousand, four hundred twenty-three".