756749 has 4 divisors (see below), whose sum is σ = 864864. Its totient is φ = 648636.

The previous prime is 756739. The next prime is 756773. The reversal of 756749 is 947657.

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: 947657 = 347 ⋅2731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-756749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (756709) 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, 54047 + ... + 54060.

It is an arithmetic number, because the mean of its divisors is an integer number (216216).

2⁷⁵⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

756749 is a deficient number, since it is larger than the sum of its proper divisors (108115).

756749 is a wasteful number, since it uses less digits than its factorization.

756749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108114.

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

The square root of 756749 is about 869.9132140622. The cubic root of 756749 is about 91.1277439504.

The spelling of 756749 in words is "seven hundred fifty-six thousand, seven hundred forty-nine".