7739248729 has 3 divisors (see below), whose sum is σ = 7739336703. Its totient is φ = 7739160756.

The previous prime is 7739248723. The next prime is 7739248837. The reversal of 7739248729 is 9278429377.

The square root of 7739248729 is 87973.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 640849225 + 7098399504 = 25315^2 + 84252^2 .

It is not a de Polignac number, because 7739248729 - 2⁵ = 7739248697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7739248723) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 43987 + ... + 131959.

It is an arithmetic number, because the mean of its divisors is an integer number (2579778901).

Almost surely, 2^7739248729 is an apocalyptic number.

7739248729 is the 87973-rd square number.

7739248729 is the 43987-th centered octagonal number.

It is an amenable number.

7739248729 is a deficient number, since it is larger than the sum of its proper divisors (87974).

7739248729 is an frugal number, since it uses more digits than its factorization.

7739248729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175946 (or 87973 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 58.

The cubic root of 7739248729 is about 1978.0302767211.

The spelling of 7739248729 in words is "seven billion, seven hundred thirty-nine million, two hundred forty-eight thousand, seven hundred twenty-nine".