730281778293 has 4 divisors (see below), whose sum is σ = 973709037728. Its totient is φ = 486854518860.

The previous prime is 730281778229. The next prime is 730281778397. The reversal of 730281778293 is 392877182037.

It is a happy number.

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 not a de Polignac number, because 730281778293 - 2⁶ = 730281778229 is a prime.

It is a super-2 number, since 2×730281778293² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730281778223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121713629713 + ... + 121713629718.

It is an arithmetic number, because the mean of its divisors is an integer number (243427259432).

Almost surely, 2^730281778293 is an apocalyptic number.

It is an amenable number.

730281778293 is a deficient number, since it is larger than the sum of its proper divisors (243427259435).

730281778293 is a wasteful number, since it uses less digits than its factorization.

730281778293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243427259434.

The product of its (nonzero) digits is 7112448, while the sum is 57.

The spelling of 730281778293 in words is "seven hundred thirty billion, two hundred eighty-one million, seven hundred seventy-eight thousand, two hundred ninety-three".