730891225 has 9 divisors (see below), whose sum is σ = 906472767. Its totient is φ = 584604840.

The previous prime is 730891207. The next prime is 730891237. The reversal of 730891225 is 522198037.

The square root of 730891225 is 27035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 263120841 + 467770384 = 16221^2 + 21628^2 .

It is not a de Polignac number, because 730891225 - 2¹³ = 730883033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 132472 + ... + 137878.

Almost surely, 2^730891225 is an apocalyptic number.

730891225 is the 27035-th square number.

730891225 is the 13518-th centered octagonal number.

It is an amenable number.

730891225 is a deficient number, since it is larger than the sum of its proper divisors (175581542).

730891225 is an frugal number, since it uses more digits than its factorization.

730891225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10824 (or 5412 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The cubic root of 730891225 is about 900.7776098361. Note that the first 3 decimals are identical.

The spelling of 730891225 in words is "seven hundred thirty million, eight hundred ninety-one thousand, two hundred twenty-five".