749989 has 8 divisors (see below), whose sum is σ = 802008. Its totient is φ = 698880.

The previous prime is 749971. The next prime is 749993. The reversal of 749989 is 989947.

It can be written as a sum of positive squares in 4 ways, for example, as 187489 + 562500 = 433^2 + 750^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 749989 - 2¹¹ = 747941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (100251).

2⁷⁴⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

749989 is a deficient number, since it is larger than the sum of its proper divisors (52019).

749989 is a wasteful number, since it uses less digits than its factorization.

749989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 163296, while the sum is 46.

The square root of 749989 is about 866.0190529082. The cubic root of 749989 is about 90.8555854544.

The spelling of 749989 in words is "seven hundred forty-nine thousand, nine hundred eighty-nine".