780938497 has 8 divisors (see below), whose sum is σ = 787386600. Its totient is φ = 774501504.

The previous prime is 780938479. The next prime is 780938519. The reversal of 780938497 is 794839087.

It can be written as a sum of positive squares in 4 ways, for example, as 20061441 + 760877056 = 4479^2 + 27584^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780938497 - 2¹⁹ = 780414209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780938797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193779 + ... + 197767.

It is an arithmetic number, because the mean of its divisors is an integer number (98423325).

Almost surely, 2^780938497 is an apocalyptic number.

It is an amenable number.

780938497 is a deficient number, since it is larger than the sum of its proper divisors (6448103).

780938497 is a wasteful number, since it uses less digits than its factorization.

780938497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 780938497 is about 27945.2768281153. The cubic root of 780938497 is about 920.8854491218.

The spelling of 780938497 in words is "seven hundred eighty million, nine hundred thirty-eight thousand, four hundred ninety-seven".