730724991 has 16 divisors (see below), whose sum is σ = 1041084000. Its totient is φ = 454284288.

The previous prime is 730724987. The next prime is 730724993. The reversal of 730724991 is 199427037.

It is not a de Polignac number, because 730724991 - 2² = 730724987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730724993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60166 + ... + 71283.

It is an arithmetic number, because the mean of its divisors is an integer number (65067750).

Almost surely, 2^730724991 is an apocalyptic number.

730724991 is a deficient number, since it is larger than the sum of its proper divisors (310359009).

730724991 is a wasteful number, since it uses less digits than its factorization.

730724991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131578.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 730724991 is about 27031.9254031229. The cubic root of 730724991 is about 900.7093136639.

The spelling of 730724991 in words is "seven hundred thirty million, seven hundred twenty-four thousand, nine hundred ninety-one".