781350361 has 6 divisors (see below), whose sum is σ = 858839786. Its totient is φ = 710318400.

The previous prime is 781350359. The next prime is 781350373. The reversal of 781350361 is 163053187.

It can be written as a sum of positive squares in only one way, i.e., 535644736 + 245705625 = 23144^2 + 15675^2 .

It is not a de Polignac number, because 781350361 - 2¹ = 781350359 is a prime.

It is a super-2 number, since 2×781350361² = 1221016773269660642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781350331) 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, 3228600 + ... + 3228841.

Almost surely, 2^781350361 is an apocalyptic number.

It is an amenable number.

781350361 is a deficient number, since it is larger than the sum of its proper divisors (77489425).

781350361 is a wasteful number, since it uses less digits than its factorization.

781350361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6457463 (or 6457452 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 781350361 is about 27952.6449732400. The cubic root of 781350361 is about 921.0473111672.

The spelling of 781350361 in words is "seven hundred eighty-one million, three hundred fifty thousand, three hundred sixty-one".