699749 has 4 divisors (see below), whose sum is σ = 704364. Its totient is φ = 695136.

The previous prime is 699733. The next prime is 699757. The reversal of 699749 is 947996.

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 348100 + 351649 = 590^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 699749 - 2⁴ = 699733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699709) 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, 2072 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (176091).

2⁶⁹⁹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

699749 is a deficient number, since it is larger than the sum of its proper divisors (4615).

699749 is a wasteful number, since it uses less digits than its factorization.

699749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614.

The product of its digits is 122472, while the sum is 44.

The square root of 699749 is about 836.5100118947. The cubic root of 699749 is about 88.7797863387.

The spelling of 699749 in words is "six hundred ninety-nine thousand, seven hundred forty-nine".