730637121 has 4 divisors (see below), whose sum is σ = 974182832. Its totient is φ = 487091412.

The previous prime is 730637111. The next prime is 730637143. The reversal of 730637121 is 121736037.

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 730637121 - 2⁷ = 730636993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730637111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121772851 + ... + 121772856.

It is an arithmetic number, because the mean of its divisors is an integer number (243545708).

Almost surely, 2^730637121 is an apocalyptic number.

It is an amenable number.

730637121 is a deficient number, since it is larger than the sum of its proper divisors (243545711).

730637121 is a wasteful number, since it uses less digits than its factorization.

730637121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243545710.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 730637121 is about 27030.3000538285. The cubic root of 730637121 is about 900.6732086536.

The spelling of 730637121 in words is "seven hundred thirty million, six hundred thirty-seven thousand, one hundred twenty-one".