756991349 has 4 divisors (see below), whose sum is σ = 759100320. Its totient is φ = 754882380.

The previous prime is 756991343. The next prime is 756991409. The reversal of 756991349 is 943199657.

It is a happy number.

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 not a de Polignac number, because 756991349 - 2²⁰ = 755942773 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 756991349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (756991343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053947 + ... + 1054664.

It is an arithmetic number, because the mean of its divisors is an integer number (189775080).

Almost surely, 2^756991349 is an apocalyptic number.

It is an amenable number.

756991349 is a deficient number, since it is larger than the sum of its proper divisors (2108971).

756991349 is a wasteful number, since it uses less digits than its factorization.

756991349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108970.

The product of its digits is 1837080, while the sum is 53.

The square root of 756991349 is about 27513.4757709745. The cubic root of 756991349 is about 911.3747080415.

The spelling of 756991349 in words is "seven hundred fifty-six million, nine hundred ninety-one thousand, three hundred forty-nine".