749686289 has 4 divisors (see below), whose sum is σ = 817839600. Its totient is φ = 681532980.

The previous prime is 749686277. The next prime is 749686303. The reversal of 749686289 is 982686947.

749686289 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, and also an emirpimes, since its reverse is a distinct semiprime: 982686947 = 11 ⋅89335177.

It is a cyclic number.

It is not a de Polignac number, because 749686289 - 2⁸ = 749686033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749686229) 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, 34076639 + ... + 34076660.

It is an arithmetic number, because the mean of its divisors is an integer number (204459900).

Almost surely, 2^749686289 is an apocalyptic number.

It is an amenable number.

749686289 is a deficient number, since it is larger than the sum of its proper divisors (68153311).

749686289 is a wasteful number, since it uses less digits than its factorization.

749686289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68153310.

The product of its digits is 10450944, while the sum is 59.

The square root of 749686289 is about 27380.3997231596. The cubic root of 749686289 is about 908.4336008122.

The spelling of 749686289 in words is "seven hundred forty-nine million, six hundred eighty-six thousand, two hundred eighty-nine".