749489 has 4 divisors (see below), whose sum is σ = 807156. Its totient is φ = 691824.

The previous prime is 749471. The next prime is 749543. The reversal of 749489 is 984947.

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 339889 + 409600 = 583^2 + 640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749489 is a prime.

It is a super-2 number, since 2×749489² = 1123467522242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (749429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28814 + ... + 28839.

It is an arithmetic number, because the mean of its divisors is an integer number (201789).

2⁷⁴⁹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

749489 is a deficient number, since it is larger than the sum of its proper divisors (57667).

749489 is a wasteful number, since it uses less digits than its factorization.

749489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57666.

The product of its digits is 72576, while the sum is 41.

The square root of 749489 is about 865.7303275270. The cubic root of 749489 is about 90.8353905397.

The spelling of 749489 in words is "seven hundred forty-nine thousand, four hundred eighty-nine".