749813 has 4 divisors (see below), whose sum is σ = 752928. Its totient is φ = 746700.

The previous prime is 749809. The next prime is 749843. The reversal of 749813 is 318947.

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: 318947 = 313 ⋅1019.

It is a cyclic number.

It is not a de Polignac number, because 749813 - 2² = 749809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 749813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749803) 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, 1163 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (188232).

2⁷⁴⁹⁸¹³ is an apocalyptic number.

It is an amenable number.

749813 is a deficient number, since it is larger than the sum of its proper divisors (3115).

749813 is a wasteful number, since it uses less digits than its factorization.

749813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114.

The product of its digits is 6048, while the sum is 32.

The square root of 749813 is about 865.9174325535. The cubic root of 749813 is about 90.8484778684.

The spelling of 749813 in words is "seven hundred forty-nine thousand, eight hundred thirteen".