4001530073 has 2 divisors, whose sum is σ = 4001530074. Its totient is φ = 4001530072.

The previous prime is 4001529977. The next prime is 4001530103. The reversal of 4001530073 is 3700351004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2565726409 + 1435803664 = 50653^2 + 37892^2 .

It is a cyclic number.

It is not a de Polignac number, because 4001530073 - 2¹⁴ = 4001513689 is a prime.

It is not a weakly prime, because it can be changed into another prime (4001530373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000765036 + 2000765037.

It is an arithmetic number, because the mean of its divisors is an integer number (2000765037).

Almost surely, 2^4001530073 is an apocalyptic number.

It is an amenable number.

4001530073 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001530073 is an equidigital number, since it uses as much as digits as its factorization.

4001530073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 4001530073 is about 63257.6483359918. The cubic root of 4001530073 is about 1587.6034294568.

Adding to 4001530073 its reverse (3700351004), we get a palindrome (7701881077).

The spelling of 4001530073 in words is "four billion, one million, five hundred thirty thousand, seventy-three".