749689 has 4 divisors (see below), whose sum is σ = 760320. Its totient is φ = 739060.

The previous prime is 749677. The next prime is 749701. The reversal of 749689 is 986947.

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.

It is an interprime number because it is at equal distance from previous prime (749677) and next prime (749701).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749659) 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 3 ways as a sum of consecutive naturals, for example, 5209 + ... + 5350.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2⁷⁴⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

749689 is a deficient number, since it is larger than the sum of its proper divisors (10631).

749689 is a wasteful number, since it uses less digits than its factorization.

749689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10630.

The product of its digits is 108864, while the sum is 43.

The square root of 749689 is about 865.8458292329. The cubic root of 749689 is about 90.8434695830.

The spelling of 749689 in words is "seven hundred forty-nine thousand, six hundred eighty-nine".