730872191 has 12 divisors (see below), whose sum is σ = 870937200. Its totient is φ = 611180640.

The previous prime is 730872169. The next prime is 730872203. The reversal of 730872191 is 191278037.

It is a de Polignac number, because none of the positive numbers 2^k-730872191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730872691) 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 11 ways as a sum of consecutive naturals, for example, 179891 + ... + 183908.

It is an arithmetic number, because the mean of its divisors is an integer number (72578100).

Almost surely, 2^730872191 is an apocalyptic number.

730872191 is a deficient number, since it is larger than the sum of its proper divisors (140065009).

730872191 is a wasteful number, since it uses less digits than its factorization.

730872191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363854 (or 363847 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 730872191 is about 27034.6479725555. The cubic root of 730872191 is about 900.7697903644.

The spelling of 730872191 in words is "seven hundred thirty million, eight hundred seventy-two thousand, one hundred ninety-one".