730000000073 has 16 divisors (see below), whose sum is σ = 747564517392. Its totient is φ = 712644480000.

The previous prime is 730000000057. The next prime is 730000000087. The reversal of 730000000073 is 370000000037.

It can be written as a sum of positive squares in 8 ways, for example, as 15352944649 + 714647055424 = 123907^2 + 845368^2 .

It is a cyclic number.

It is not a de Polignac number, because 730000000073 - 2⁴ = 730000000057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 729999999982 and 730000000054.

It is not an unprimeable number, because it can be changed into a prime (730000009073) 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, 26093813 + ... + 26121773.

It is an arithmetic number, because the mean of its divisors is an integer number (46722782337).

Almost surely, 2^730000000073 is an apocalyptic number.

730000000073 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

730000000073 is a deficient number, since it is larger than the sum of its proper divisors (17564517319).

730000000073 is a wasteful number, since it uses less digits than its factorization.

730000000073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31676.

The product of its (nonzero) digits is 441, while the sum is 20.

It can be divided in two parts, 7300000000 and 73, that multiplied together give a square (532900000000 = 730000²).

The spelling of 730000000073 in words is "seven hundred thirty billion, seventy-three", and thus it is an aban number.