780029875249 has 3 divisors (see below), whose sum is σ = 780030758443. Its totient is φ = 780028992056.

The previous prime is 780029875211. The next prime is 780029875267. The reversal of 780029875249 is 942578920087.

The square root of 780029875249 is 883193.

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., 251256575025 + 528773300224 = 501255^2 + 727168^2 .

It is not a de Polignac number, because 780029875249 - 2⁹ = 780029874737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780029875349) 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, 441597 + ... + 1324789.

Almost surely, 2^780029875249 is an apocalyptic number.

780029875249 is the 883193-rd square number.

780029875249 is the 441597-th centered octagonal number.

It is an amenable number.

780029875249 is a deficient number, since it is larger than the sum of its proper divisors (883194).

780029875249 is an frugal number, since it uses more digits than its factorization.

780029875249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766386 (or 883193 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 780029875249 in words is "seven hundred eighty billion, twenty-nine million, eight hundred seventy-five thousand, two hundred forty-nine".