730997405 has 8 divisors (see below), whose sum is σ = 898592184. Its totient is φ = 570534400.

The previous prime is 730997389. The next prime is 730997417. The reversal of 730997405 is 504799037.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53904964 + 677092441 = 7342^2 + 26021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 730997405 - 2⁴ = 730997389 is a prime.

It is a super-2 number, since 2×730997405² = 1068714412233468050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782716 + ... + 1783125.

It is an arithmetic number, because the mean of its divisors is an integer number (112324023).

Almost surely, 2^730997405 is an apocalyptic number.

It is an amenable number.

730997405 is a deficient number, since it is larger than the sum of its proper divisors (167594779).

730997405 is a wasteful number, since it uses less digits than its factorization.

730997405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565887.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 730997405 is about 27036.9636793779. The cubic root of 730997405 is about 900.8212277882.

The spelling of 730997405 in words is "seven hundred thirty million, nine hundred ninety-seven thousand, four hundred five".