730213507861 has 4 divisors (see below), whose sum is σ = 734036615424. Its totient is φ = 726390400300.

The previous prime is 730213507841. The next prime is 730213507867. The reversal of 730213507861 is 168705312037.

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 a de Polignac number, because none of the positive numbers 2^k-730213507861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730213507867) 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 3 ways as a sum of consecutive naturals, for example, 1911553495 + ... + 1911553876.

It is an arithmetic number, because the mean of its divisors is an integer number (183509153856).

Almost surely, 2^730213507861 is an apocalyptic number.

It is an amenable number.

730213507861 is a deficient number, since it is larger than the sum of its proper divisors (3823107563).

730213507861 is a wasteful number, since it uses less digits than its factorization.

730213507861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823107562.

The product of its (nonzero) digits is 211680, while the sum is 43.

Adding to 730213507861 its reverse (168705312037), we get a palindrome (898918819898).

The spelling of 730213507861 in words is "seven hundred thirty billion, two hundred thirteen million, five hundred seven thousand, eight hundred sixty-one".