749891393 has 4 divisors (see below), whose sum is σ = 750278100. Its totient is φ = 749504688.

The previous prime is 749891381. The next prime is 749891431. The reversal of 749891393 is 393198947.

It is a happy number.

749891393 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.

It can be written as a sum of positive squares in 2 ways, for example, as 442345024 + 307546369 = 21032^2 + 17537^2 .

It is a cyclic number.

It is not a de Polignac number, because 749891393 - 2⁴ = 749891377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (749891293) 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, 190430 + ... + 194327.

It is an arithmetic number, because the mean of its divisors is an integer number (187569525).

Almost surely, 2^749891393 is an apocalyptic number.

It is an amenable number.

749891393 is a deficient number, since it is larger than the sum of its proper divisors (386707).

749891393 is a wasteful number, since it uses less digits than its factorization.

749891393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386706.

The product of its digits is 1469664, while the sum is 53.

The square root of 749891393 is about 27384.1449200080. The cubic root of 749891393 is about 908.5164382954.

The spelling of 749891393 in words is "seven hundred forty-nine million, eight hundred ninety-one thousand, three hundred ninety-three".