770781313 has 4 divisors (see below), whose sum is σ = 804293568. Its totient is φ = 737269060.

The previous prime is 770781311. The next prime is 770781371. The reversal of 770781313 is 313187077.

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 770781313 - 2¹ = 770781311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770781311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16756093 + ... + 16756138.

It is an arithmetic number, because the mean of its divisors is an integer number (201073392).

Almost surely, 2^770781313 is an apocalyptic number.

It is an amenable number.

770781313 is a deficient number, since it is larger than the sum of its proper divisors (33512255).

770781313 is a wasteful number, since it uses less digits than its factorization.

770781313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33512254.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 770781313 is about 27762.9485645887. The cubic root of 770781313 is about 916.8755513097.

The spelling of 770781313 in words is "seven hundred seventy million, seven hundred eighty-one thousand, three hundred thirteen".