675749 has 4 divisors (see below), whose sum is σ = 677664. Its totient is φ = 673836.

The previous prime is 675743. The next prime is 675751. The reversal of 675749 is 947576.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675749 is a prime.

It is a super-2 number, since 2×675749² = 913273422002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (675743) 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, 257 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (169416).

2⁶⁷⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

675749 is a deficient number, since it is larger than the sum of its proper divisors (1915).

675749 is a wasteful number, since it uses less digits than its factorization.

675749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914.

The product of its digits is 52920, while the sum is 38.

The square root of 675749 is about 822.0395367621. The cubic root of 675749 is about 87.7529659200.

The spelling of 675749 in words is "six hundred seventy-five thousand, seven hundred forty-nine".