730920643 has 6 divisors (see below), whose sum is σ = 733777044. Its totient is φ = 728067636.

The previous prime is 730920623. The next prime is 730920667. The reversal of 730920643 is 346029037.

It is not a de Polignac number, because 730920643 - 2²⁹ = 194049731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 730920599 and 730920608.

It is not an unprimeable number, because it can be changed into a prime (730920623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 472930 + ... + 474472.

It is an arithmetic number, because the mean of its divisors is an integer number (122296174).

Almost surely, 2^730920643 is an apocalyptic number.

730920643 is a deficient number, since it is larger than the sum of its proper divisors (2856401).

730920643 is an frugal number, since it uses more digits than its factorization.

730920643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 730920643 is about 27035.5440670241. The cubic root of 730920643 is about 900.7896949542.

The spelling of 730920643 in words is "seven hundred thirty million, nine hundred twenty thousand, six hundred forty-three".