756997729 has 6 divisors (see below), whose sum is σ = 758572854. Its totient is φ = 755425440.

The previous prime is 756997723. The next prime is 756997733. The reversal of 756997729 is 927799657.

It can be written as a sum of positive squares in 3 ways, for example, as 364046400 + 392951329 = 19080^2 + 19823^2 .

It is not a de Polignac number, because 756997729 - 2³ = 756997721 is a prime.

It is a super-2 number, since 2×756997729² = 1146091123422314882, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (15002820) is a multiple of the sum of its prime factors (2835).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (756997721) 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 5 ways as a sum of consecutive naturals, for example, 572389 + ... + 573709.

It is an arithmetic number, because the mean of its divisors is an integer number (126428809).

Almost surely, 2^756997729 is an apocalyptic number.

It is an amenable number.

756997729 is a deficient number, since it is larger than the sum of its proper divisors (1575125).

756997729 is an frugal number, since it uses more digits than its factorization.

756997729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835 (or 2078 counting only the distinct ones).

The product of its digits is 15002820, while the sum is 61.

The square root of 756997729 is about 27513.5917139148. The cubic root of 756997729 is about 911.3772684205.

The spelling of 756997729 in words is "seven hundred fifty-six million, nine hundred ninety-seven thousand, seven hundred twenty-nine".